Steve Johnson stops himself at the wall for the court during his match against Richard Gasquet, of France, in the third round of play at the 2012 US Open tennis tournament, Sunday, Sept. 2, 2012, in New York. (AP Photo/Paul Bereswill)
Maria Sharapova of Russia celebrates her win over Nadia Petrova, also of Russia, in the fourth round of the US Open Sunday in New York. Sharapova won 6-1, 4-6, 6-4 and will next face Marion Bartoli of France.
Nadia Petrova of Russia, here reaching for a backhand, took Maria Sharapova to three sets but was unable to finish the job, losing 1-6, 6-4, 4-6.
Six-foot-nine and psyched
John Isner pumps his fist after winning a point against Philipp Kohlschreiber of Germany in the third round on Sunday. The American Isner, no stranger to extremely long matches, played to 2:26 a.m. local time in match that tied the 19-year-old tournament record for latest (or earliest?) finish time. But ultimately, it was Kohlschreiber who lived to perhaps celebrate another day, winning 6-4, 3-6, 4-6, 6-3, 6-4.
I wanna toss it there
Philipp Kohlschreiber of Germany serves to John Isner in the third round Sunday at the US Open in New York.
Day 7: For the upset
Marion Bartoli, of France, reacts during a match against Petra Kvitova, of the Czech Republic, in the fourth round of the US Open on Sunday in New York. Bartoli upset Kvitova 1-6, 6-2, 6-0.
Day 7: Hard return
Petra Kvitova of the Czech Republic returns a shot to Marion Bartoli, of France, in the fourth round of the US Open tennis tournament on Sunday.
Day 7: Pumped up
Anna Tatishvili of Georgia pumps her fist during her US Open women's singles fourth round match against Victoria Azarenka of Belarus at the USTA Billie Jean King National Tennis Center in New York on Sunday. Azarenka won the match.
Day 7: Power serve
Maria Sharapova, of Russia, serves to Nadia Petrova, of Russia, in the fourth round of the U.S. Open tennis tournament Sunday.
Day 7: Feeling good
Switzerland's Stanislas Wawrinka reacts during his match against Ukraine's Alexandr Dolgopolov in the third round of the 2012 US Open on Sunday.
Day 7: Lunging Lleyton
Lleyton Hewitt of Australia hits a return to David Ferrer of Spain during their men's singles match Sunday at the US Open. Ferrer defeated Hewitt, the 2001 Open champ, to reach the fourth round.
Day 7: Keepin' on
Andy Roddick of the United States celebrates during his third-round victory over Fabio Fognini. The victory staves off Roddick's retirement for at least one more match.
Day 7: Man in motion
Fabio Fognini of Italy hits a forehand against Andy Roddick of the United States during their third-round match Sunday. Roddick, who announced he will retire after the US Open, won to keep his career going.
Day 7: Still the one
Defending champion Novak Djokovic of Serbia reacts after his decisive third-round victory over Julien Benneteau of France in the third round Sunday.
Day 7: Liftoff
Julien Benneteau of France serves against Novak Djokovic of Serbia during their third-round match Sunday. Djokovic, the defending champion, won easily.
Day 6: Beast of Berdych
Tomas Berdych slings a forehand at Sam Querrey during the third round of the U.S. Open on Saturday. Berdych won in four sets.
Day 6: Moving on
Ana Ivanovic, returning a shot to Sloane Stephens, won in three sets to reach the fourth round of the U.S. Open.
Day 6: Still smiling
Sloane Stephens congratulates Ana Ivanovic after Stephens lost in three sets on Saturday.
Day 6: Work for it
Andy Murray lunges to return a shot against Feliciano Lopez of Spain during their third-round match. It took Murray four sets, three of which he won in a tiebreak, to advance to the fourth round.
Day 6: Eye on the ball
Spain's Fernando Verdasco focuses as he returns a shot to Switzerland's Roger Federer in their third-round match. Verdasco posed little trouble for the No. 1 seed Federer who easily reached the fourth round in straight sets.
Day 6: Fed express
Switzerland's Roger Federer takes down Spain's Fernando Verdasco in straight sets to reach the fourth round.
Day 6: Aces high
Serena Williams served up eight aces during her match against Ekaterina Makarova of Russia. Williams won 6-4, 6-0 and will play Andrea Hlavackova of the Czech Republic next.
Day 6: Getting to the net
No. 2 seed Agnieszka Radwanska gets to the net to return a shot against Jelena Jankovic during their third-round match. Radwanska won in straight sets and will play No. 20 Roberta Vinci next.
Day 6: Are you kidding?
No. 30 seed Jelena Jankovic shows her frustration during her third-round match against No. 2 seed Agnieszka Radwanska.
Day 5: All lined up
Andy Roddick returns a shot to Australia's Bernard Tomic in third-round action. Thursday, Roddick announced his intentions to retire following this tournament.
Day 5: Guess who!
Of course, it's the Williams sisters. Serena (left) and Venus (right) are see during their second-round doubles match. The sisters defeated Klaudia Jans-Ignacik, of Poland, and Kristina Mladenovic, of France 6-4, 6-0.
Day 5: Not camera shy
Actress and model Brooklyn Decker -- wife of Andy Roddick -- shoots video with her cell phone as Roddick walks onto the court before playing Australia's Bernard Tomic in the third round.
Day 5: New moves
Belgium's Kim Clijsters and Bob Bryan celebrate their third-round mixed doubles win against Irina Falconi and Steve Johnson with a trademark Bryan brothers chest bump.
Day 5: Tipping point
No. 8 seed Janko Tipsarevic of Serbia returns a shot against Brian Baker during their second-round match. Tipsarevic won in straight sets and will face Grega Zemlja in the third round.
Day 5: Wham Sam!
Defending champion Samantha Stosur is all muscle as she returns a shot against Varvara Lepchenko during their third-round match. Stosur won and will meet Laura Robson in the fourth round.
Day 5: Top of her game?
Russia's Maria Sharapova continues to move through the draw easily with a 6-1, 6-1 win over American qualifier Mallory Burdette in the third round.
Day 5: Moving on
No. 5 seed Petra Kvitova of the Czech Republic returns a shot to Pauline Parmentier of France during their third-round match. Kvitova won and will play Marion Bartoli in the fourth round.
Day 5: Bowled over
Britain's Laura Robson reacts after her upetting No. 9 seed Li Na in the third round of play.
Day 5: Awww man!
American Varvara Lepchenko reacts during her match against defending champion Samantha Stosur. Stosur won 7-6 (5), 6-2 and will face Laura Robson in the fourth round.
Day 4: Happy Birthday?
On his 30th birthday, Andy Roddick called a press conference to announce his retirement at the conclusion of the 2012 US Open.
Day 4: High jump
Jo-Wilfried Tsonga of France jumps over the net during his match against Slovakia's Martin Klizan in the second round. The No. 5 seed Tsonga was upset by Klizan.
Day 4: Surprise winner
Slovakia's Martin Klizan reacts after beating France's Jo-Wilfried Tsonga in the second round of play. Klizan will play France's Jeremy Chardy next.
Day 4: Oh man!
France's Jo-Wilfried Tsonga reacts during his match against Slovakia's Martin Klizan in the second round of play. Klizan upset the fifth-seeded Tsonga 6-1, 1-6, 6-1, 6-3.
Day 4: Goofing around
Serena Williams has a little fun during her second-round match against Maria Jose Martinez Sanchez of Spain. Serena won 6-2, 6-4.
Day 4: Lift off
No. 1 seed Roger Federer leaves the ground as he reaches for a shot against Bjorn Phau of Germany during his second-round match at the US Open. Federer won his match in straight sets and wil play No. 25 Fernando Verdasco next.
Day 4: Next gen?
On the day Andy Roddick announced his intent to retire, American teen Jack Sock serves up a decisive win over Italy's Flavio Cipolla to reach the third round. Sock won 6-2, 6-2, 6-2.
Day 4: What a bummer
Germany's Philipp Petzschner reacts during his match against Spain's Nicolas Almagro in the second round of play. Almagro won the match and will face American Jack Sock next.
Day 4: Serve's up
Spain's Feliciano Lopez serves to Spain's Pablo Andujar in the second round of play. Lopez needed five sets to get the win and will play Andy Murray next.
Day 4: Shrug it off
Mardy Fish reacts during his second-round match against Nikolay Davydenko of Russia. Fish rallied from two sets down to win the match and reach the third round.
Day 4: Shout it out!
Spain's Nicolas Almagro reacts after defeating Germany's Philipp Petzschner in five sets to reach the third round.
Day 4: Pumped up kicks
Former world No. 1 Ana Ivanovic celebrates her 6-2, 6-2 second-round win over Sweden's Sofia Arvidsson. She'll play American Sloane Stephens next.
Day 3: Got this!
Maria Sharapova of Russia reacts during her match against Lourdes Dominguez Lino of Spain on Day 3 of the US Open at Billie Jean King National Tennis Center. Sharapova won 6-0, 6-1.
Day 3: Give it your all
Maria Sharapova serves against Lourdes Dominguez Lino on Day 3 of the US Open at Billie Jean King National Tennis Center.
Day 3: King of the court
Andy Murray of Great Britain follows through on a return against Ivan Dodig of Croatia on Day 3 of the US Open at Billie Jean King National Tennis Center.
Day 3: Goodbye girl
Kim Clijsters waves to the crowd after her final career singles match.
Day 3: Emotional day
Kim Clijsters, left, hugs Laura Robson, right, after their match on Day 3 of the US Open. Robson beat Clijsters 7-6(4), 7-6(5) to reach the third round, thus closing out Clijsters' career. The three-time US Open champion has said this would be her last professional tournament.
Day 3: Lean into it
Janko Tipsarevic of Serbia reaches for a shot against Guillaume Rufin of France in the second round of play. The No. 8 seed Tipsarevic rallied from two sets down to win the match.
Day 3: Just out
Xavier Malisse of Belgium gestures during his match with John Isner in the second round of play. Malisse was very vocal during this match about many of the line calls.
Day 3: Back to basics
Janko Tipsarevic of Serbia reacts during his five-set first-round match against France's Guillaume Rufin. Tipsarevic overcame a two set defecit to win 4-6, 3-6, 6-2, 6-3, 6-2.
Day 3: Bake sail
USA's Brian Baker continues his return with a solid first-round win over Czech veteran Jan Hajek. Next up he'll face No. 8 seed Janko Tipsarevic in the second round.
Day 3: One's not done
No. 1 seed Victoria Azarenka shakes hands with qualifier Kirsten Flipkens of Belgium after their second-round match. Azarenka won 6-2, 6-2 and will face No. 28 seed Jie Zheng.
Day 3: Tied up
John Isner survives two set tiebreaks to defeat Xavier Malisse and reach the second round.
Day 3: Go Cardinal!
Stanford senior and wild card entry Mallory Burdette of the United States celebrates match point in the second-round match against Lucie Hradecka of the Czech Republic.
Day 3: Flex fuel
Russia's Nadia Petrova muscles her way past Simona Halep of Romania and into the third round where she'll play Czech Republic's Lucie Safarova.
Day 3: New heights
John Isner, who stands 6-foot-9, walks by a lines judge during his first-round match against Xavier Malisse of Belgium.
Day 3: Oh Lucie!
Lucie Safarova of the Czech Republic serves to Aleksandra Wozniak of Canada during their second-round match on August 29.
Day 3: High life
Seeded No. 4, Spain's David Ferrer returns a shot to Kevin Anderson of South Africa in the first round of play at the 2012 US Open.
Day 3: Get to the ball
Victoria Azarenka of Belarus scrambles to the return a shot against Kirsten Flipkens of Belgium in their second-round match.
Day 2: Dominating
Novak Djokovic (SRB) serves against PAolo Lorenzi (ITA) on Day 2 of the US Open at Billie Jean King National Tennis Center. Djokovic won 6-1, 6-0, 6-1.
Serena Williams (USA) returns a shot against Coco Vandeweghe (USA) on Day 2 of the 2012 US Open at Billie Jean King National Tennis Center. Williams won 6-1, 6-1.
Day 2: Eye on the ball
Serbia's Novak Djokovic returns to Italy's Paolo Lorenzi during their men's US Open first round match at the USTA Billie Jean King National Tennis Center in New York on Tuesday.
Day 2: Happy returns
Serena Williams of the US returns to compatriot Coco Vandeweghe during their women's US Open match at the USTA Billie Jean King National Tennis Center in New York on Tuesday.
Day 2: Quick match
Novak Djokovic (SRB) returns a shot against PAolo Lorenzi (ITA) on Day 2 of the US Open at Billie Jean King National Tennis Center.
Day 2: Want a challenge?
Sloane Stephens challenges a line call during her opening match against Francesca Schiavone. Stephens upset the No. 22 seed in straight sets.
Day 2: Moving ahead
Serbia's Jelena Jankovic powers past Ukraine's Kateryna Bondarenko and into the second round of the US Open.
Day 2: Tough opening
French Open finalist Sara Errani needs three sets to defeat Spain's Garbine Muguruza in the first round. Seeded No. 10, Errani will take on Russia's Vera Dushevina in the second round.
Day 2: On the run
Andy Roddick hits a backhand on the run to American Rhyne Williams during their first-round match.
Day 2: Jump ball
France's Jo-Wilfried Tsonga celebrates after winning his first-round match against Slovakia's Karol Beck on Tuesday. The No. 5 seed Tsonga will play Slovakia's Martin Klizan in the second round.
Day 2: Color guard
The always colorful Bethanie Mattek-Sands returns a shot to Venus Williams during the first round. Venus won 6-3, 6-1 to reach the second round.
Day 2: Tough competition
Bethanie Mattek-Sands (USA) returns a shot against Venus Williams (USA) on Day 2 of the US Open at Billie Jean King National Tennis Center.
Day 2: Planet fitness
Venus Williams shows no sign of injury or illness in a 6-3, 6-1 win over Bethanie Mattek-Sands to reach the second round.
Day 2: All-American
Former NCAA finalist for the Tennessee Volunteers Rhyne Williams returns a shot against Andy Roddick during their first-round match at the US Open on Tuesday. Roddick won 6-3, 6-4, 6-4.
Day 2: Clock is ticking
No. 2 seed Agnieszka Radwanska rests during a line change in her first-round match against Russia's Nina Bratchikova. Radwanska breezed through the match in 54 minutes with a 6-1, 6-1 win.
Day 2: Eye on the prize
Former world No. 1 Ana Ivanovic returns a shot during her first-round match against Ukraine's Elina Svitolina. Ivanovic won 6-3, 6-2.
Day 2: Sigh of the times
Ukraine's Elina Svitolina reacts during her first-round loss to Serbia's Ana Ivanovic on Tuesday.
Day 1: Roger that
Top-seeded Roger Federer serves to Donald Young during a first-round match at the US Open in New York on Monday. Federer, aiming to extend his record with an 18th Grand Slam title, needed only one hour, 34 minutes to defeat Young 6-3, 6-2, 6-4. The victory improved Federer's US Open career mark to 62-7.
Day 1: Tough task
Donald Young eyes a return during his three-set loss to top seed and five-time US Open champ Roger Federer on Monday. Federer, who won Wimbledon earlier this summer, finished with 17 aces in the first-round victory over Young.
Day 1: Hot streak
Belgium's Kim Clijsters returns a point against American Victoria Duval during their first-round match at the USTA Billie Jean King National Tennis Center in New York on Monday. Clijisters won 6-3, 6-1 for her 22nd consecutive US Open victory. At 16, Duval is the youngest women in this year's tournament — she earned a berth by winning the under-18 US national championship.
Day 1: A leg up
No. 3 seed Maria Sharapova serves to Hungary's Melinda Czink during their first-round match on Monday. Sharapova won 6-2, 6-2.
Day 1: You don't know Jack
Jack Sock reacts to a call during his first-round match against Florian Mayer. Sock led two sets to love before Mayer retired.
Day 1: Making a play
Ball person Ryan McIntyre of San Antonio, Texas, chases down a ball during the match between Lukas Lacko and James Blake in the first round on Monday. Blake won in four sets.
Day 1: Don't get mad
Melanie Oudin returns a shot to Lucie Safarova of the Czech Republic during their first-round match. Safarova defeated the American 6-4, 6-0 on Monday.
Day 1: Swiss miss
Switzerland's Romina Oprandi returns a shot to Germany's Andrea Petkovic in their first-round match on Monday. Oprandi easily defeated the recovering Petkovic to reach the second round.
Day 1: Power hitter
France's Marion Bartoli returns a shot to American Jamie Hampton at the US Open during their first-round match on Monday. The No. 11-seeded Bartoli easily advanced to the second round.
Day 1: Racquet head
Jamie Hampton reacts during her first-round match against Marion Bartoli of France on Monday. Bartoli won 6-3, 7-6 (5).
Day 1: Worried look
Sabine Lisicki looks a little panicked as she returns a shot to Romania's Sorana Cirstea during their first-round match on Monday. The No. 16-seed was upset by Cirstea in three sets.
Day 1: Looking up?
Sorana Cirstea tosses to serve against Sabine Lisicki during their first-round match on Monday. Cirstea upset Lisicki 4-6, 6-2, 6-2 to reach the second round.
Day 1: Back on track
American James Blake returns a shot to Slovakia's Lukas Lacko during their first-round match. Blake won the match in four sets on Monday and will face No. 24 seed Marcel Granollers in the second round.
Day 1: Rain delay
Fans use umbrellas to stay dry during a rain delay at the US Open on Monday. Rain has plagued the tournament the last few years, forcing the men's final to be played on a Monday for four consecutive years.
Day 1: Net gain
China's Li Na returns a shot at the net to Britain's Heather Watson during their first-round match on Monday. Li won the match 6-2, 6-3 and will play Australia's Casey Dellacqua in the second round.
Day 1: Tough enough?
Australia's Samantha Stosur shows her trademark kick serve during Monday's first-round match at the 2012 US Open. Last year Stosur defeated Serena Williams in the final to win her first Grand Slam title.
Day 7: Returning for more
Victoria Azarenka, of Belarus, returns a shot to Anna Tatishvili, of Georgia, in the fourth round of the US Open on Sunday in New York. Azarenka won 6-2, 6-2.
Day 7: It's a stretch
Ukraine's Alexandr Dolgopolov returns a shot to Switzerland's Stanislas Wawrinka in the third round of the US Open on Sunday. Wawrinka won the match.