US Open late-rounds action

Sep 7, 2012; Queens, NY, USA; Tennis ball fuzz flies off the racquet of Maria Sharapova (RUS) as she returns a shot against Victoria Azarenka (BLR) on day twelve of the 2012 US Open at Billie Jean King National Tennis Center

Serena Williams celebrates after scoring match point against Sara Errani in their US Open semifinal match. Williams won 6-1, 6-2.

Sara Errani serves against Serena Williams during their semifinal match. Serena proved too powerful for Errani winning 6-1, 6-2.

Serena Williams reacts during her semifinal match against Sara Errani.

At 6-foot-2, Maria Sharapova can stretch and cover a lot of ground as seen here during her semifinal match against No. 1 Victoria Azarenka.

Maria Sharapova's fist-pump looks a little more hesitant than we're used to seeing.

World No. 1 Victoria Azarenka returns a shot against Maria Sharapova during their quarterfinal match. Azarenka lost the first set but fought back to reach her first US Open final.

Maria Sharapova reacts after losing a point during her match against Victoria Azarenka. Though Sharapova won the first set, Azarenka fought back to win the match 3-6, 6-2, 6-4.

Maria Sharapova, of Russia, left, shakes hands with Victoria Azarenka, of Belarus, after losing thier semifinal match. Azarenka came back after dropping the first set and will face Serena Williams in the final.

Victoria Azarenka dances on the court after defeating Maria Sharapova for a spot in Saturday's final. Azarenka won 3-6, 6-2, 6-4.

Bob (left) and Mike Bryan celebrate after defeating India's Leander Paes and Czech Republic's Radek Stepanek to win the US Open men's doubles title. This is their 12th Grand Slam title, setting a new record.

Bob Bryan (second from left) and Mike Bryan (left) shake hands with Leander Paes (right), and Radek Stepanek (second from right) after the men's doubles final. The Bryan brothers won 6-3, 6-4.

Mike (left) and Bob Bryan are no doubt used to sharing things. This doubles trophy is just another to add to their growing collection.

No. 2 seed Novak Djokovic took control of the match early and despite a solid effort by Juan Martin del Potro in an 85-minute second set, the defending champion won 6-2, 7-6(3), 6-4 and will play No. 4 seed David Ferrer in the semifinals.

Juan Martin Del Potro gestures after challenging a line call during his quarterfinal match against Novak Djokovic. Despite his best effort the defending champion Djokovic won in straight sets.

Novak Djokovic of Serbia leaps off the ground as he returns to Argentina's Juan Martin del Potro during their quarterfinal match.

Defending champion Novak Djokovic serves to 2010 US Open chamion Juan Martin del Potro in their quarterfinal match.

No. 4 seed David Ferrer of Spain reacts after defeating Janko Tipsarevic in five sets to reach the US Open semifinals.

Last-minute mixed doubles partners Ekaterina Makarova of Russia and Bruno Soares of Brazil defeated Kveta Peschke and Marcin Matkowski for the US Open mixed doubles title on September 6.

Spain's David Ferrer makes a play during his quarterfinal match against Serbia's Janko Tipsarevic. Ferrer won a very tough five-set match in a tiebreak to reach the semifinals.

Janko Tipsarevic serves to David Ferrer during their quarterfinal match.

Janko Tipsarevic of Serbia slipped and fell during his quarterfina match against No. 4 David Ferrer. Tipsarevic was able to finish the match and fought hard into a fifth-set tiebreak, but Ferrer won 6-3, 67(5), 2-6, 6-3, 7-6(4).

Tomas Berdych raises his arms after defeating world No. 1 Roger Federer 7-6 (1), 6-4, 3-6, 6-3 in their quarterfinal match. Berdych will play Andy Murray in the US Open semifinal round.

Serena Williams takes a seat after chasing down a ball during her quarterfinal match against Ana Ivanovic.

Serena Williams reacts during her quarterfinal match against Ana Ivanovic. Serena won 6-1, 6-3 and will play Sara Errani in the semifinal round.

No. 6 seed Tomas Berdych is all business against No. 1 Roger Federer, jumping to a two sets to love lead before finishing his upset.

World No. 1 Roger Federer serves to Tomas Berdych during their quarterfinal match.

Ana Ivanovic reacts after missing a shot against Serena Williams during their quarterfinal match. Serena won the match 6-1, 6-3 to reach the semifinals for the second straight year.

Andy Murray shouts during his quarterfinal match against Marin Cilic of Croatia. Murray dropped the first set before recovering to reach the US Open semifinals.  

Model Brooklyn Decker shows a lot of emotion after the match between her husband Andy Roddick (USA) and Juan Martin Del Potro (ARG). Del Potro won 6-7(1), 7-6(4), 6-2, 6-4, thus ending Roddick's career.  

Former US Open champion Juan Martin del Potro of Argentina returns a shot to another former champion Andy Roddick in their fourth-round match.

Andy Roddick receives a hug from Argentina's Juan Martin Del Potro  after their fourth-round match. Del Potro won 6-7(1), 7-6(4), 6-2, 6-4. Roddick is off to retirement.

Maria Sharapova defeated Marion Bartoli 3-6, 6-3, 6-4 in a tough-fought quarterfinal match by both players. The intensity continued at the net, even after the match.

Maria Sharapova finds a way to return a shot to Marion Bartoli and find a way back into their match. When play was suspended Tuesday due to rain, Bartoli led 4-0.

Maria Sharapova wipes her face during her match against Marion Bartoli. Sharapova overcame a tough first set to win in three and reach her first US Open semifinals since 2006.

Workmen drive "Slamboni" machines to dry the court at Arthur Ashe Stadium during a rain delay.

Italy's Sara Errani stretches to return to doubles partner and quarterfinal opponent Roberta Vinci. Errani won to reach her second Slam semifinal of the year.

After hours of rain delays, Andy Roddick and Juan Martin del Potro finally get on court to play their fourth-round match, only to face another delay in their first-set tiebreaker.

Maria Sharapova did not start her match very well against France's Marion Bartoli. Bartoli jumped out to a 4-0 lead before rain postponed the rest of the match. They will resume play Wednesday.

Marion Bartoli is pumped up after jumping out to a 4-0 lead against Maria Sharapova before rain interrupted play. Can Bartoli keep it going when the match continues Wednesday?

No. 1 seed Victoria Azarenka celebrates her win over defending champion Samantha Stosur to reach her first US Open semifinal. She won 6-1, 4-6, 7-6 (5).

Tennis fans use umbrellas during a rain delay for a match between world No. 1 Victoria Azarenka and defending champion Samantha Stosur. Rain was a factor throughout the day on Tuesday, Sept. 4.

France's Richard Gasquet digs out a return to David Ferrer in the fourth round of play. Gasquet lost to Ferrer 7-5, 7-6, 6-4.

Grounds crews dry the court at Arthur Ashe Stadium Tuesday during a rain delay of a match between Samantha Stosur and Victoria Azarenka.

Italian doubles team Sara Errani (left) and Roberta Vinci of Italy strategize during their quarterfinal match against against Julia Goerges of Germany and Kristyna Pliskova of the Czech Republic. In singles, Errani and Vinci will be on opposite sides of the net in their quarterfinal match.

Samantha Stosur returns a shot against Victoria Azarenka during their quarterfinal match. Stosur lost the first set 6-1, but fought back to force a third set. However, the 2011 US Open champion lost to Azarenka in a third set tiebreak.

Andy Murray serves against Milos Raonic on Day 8 of the 2012 US Open at Billie Jean King National Tennis Center. Murray dominated 6-4, 6-4, 6-2.  

Andy Murray serves against Milos Raonic on Day 8 of the 2012 US Open at Billie Jean King National Tennis Center.  

Kim Sears, the girlfriend of Andy Murray, watches his match against Milos Raonic of Canada on Day 8 of the 2012 US Open at Billie Jean King National Tennis Center.  

Maria Kirilenko and Nadia Petrova of Russia, top, defeat Serena and Venus Williams, bottom, on Day 8 of the US Open at Billie Jean King National Tennis Center.  

Italy's Roberta Vinci returns a shot to Poland's Agnieszka Radwanska in Day 8 of the US Open on Monday. Vinci, best known as a doubles player upset the No. 2 seed 6-1, 6-4 to reach the quarterfinals.

Marin Cilic of Croatia returns a shot to Slovakia's Martin Klizan in the fourth round Monday. Cilic won 7-5, 6-4, 6-0.

Germany's Angelique Kerber reacts during her loss to Italy's Sara Errani in the fourth round Monday.

Serena Williams serves against Andrea Hlavackova en route to a 6-0, 6-0 blanking Monday in the fourth round.

Slovakia's Martin Klizan reacts during his straight-sets loss to Marin Cilic of Croatia in the fourth round Monday.

Sara Errani hits tennis balls into the crowd after she defeated Angelique Kerber 7-6 (5), 6-3 on Monday.

Agnieszka Radwanska reacts during her loss to Roberta Vinci on Monday. Radwanska, the No. 2 seed, lost 6-1, 6-4.

The New York City skyline is seen during the fourth round of play at the 2012 US Open on Monday.

A trainer works on the neck of Bulgaria's Tsvetana Pironkova during her match against Serbia's Ana Ivanovic. Ivanovic won the match to reach the quartefinals.

Czech Republic's Tomas Berdych reacts after winning his match against Spain's Nicolas Almagro in the fourth round of play. Berdych, the No. 6 seed, will play Roger Federer in the quarterfinals.

Serbia's Ana Ivanovic reacts after winning her match against Bulgaria's Tsvetana Pironkova to reach her first Grand Slam quartefinals since 2008.