The Latest: Radwanska rolls into 4th round in Melbourne

Kei Nishikori of Japan serves to Guillermo Garcia-Lopez of Spain during their third round match at the Australian Open tennis championships in Melbourne, Australia, Friday, Jan. 22, 2016.(AP Photo/Andrew Brownbill)

MELBOURNE, Australia (AP) The latest from the Australian Open on Friday (all times local):

6:30 p.m.

Agnieszka Radwanska has reached the round of 16 at the Australian Open for the sixth straight year, beating Puerto Rico's Monica Puig 6-4, 6-0.

Puig kept pace through the first eight games before the fourth-seeded Radwanska was finally able to break her and take the opening set. Puig didn't win another game after that.

Radwanska said she wasn't expecting such a tough challenge at the start of the match. She said Puig ''was playing with amazing intensity, I was really in trouble in that first set.''

She also had her left ankle treated by a trainer, but shook off any injury concerns, saying, ''pain is my second name.''

Radwanska next plays unseeded Anna-Lena Friedsam of Germany, who edged 13th-seeded Italian Roberta Vinci 0-6, 6-4, 6-4.

5:10 p.m.

Lauren Davis was a little hungry after edging Maria Sharapova in a tight, second-set tiebreaker on Rod Laver Arena, so she decided to have a little snack in her courtside chair.

Some players go for a banana in those moments, but not Davis. She pulled out a jar of almond butter and ate a couple spoonfuls before starting the third set.

Davis said she needed an energy boost because she hadn't had lunch before the match. She says, ''I usually put the almond butter on the banana, but I thought that was a little too much this time.''

As for Sharapova, who won the third-round match 6-1, 6-7 (5), 6-0, she sticks to energy bars and gels for her on-court snacking.

She says, ''I don't do bananas anymore.''

5 p.m.

Roberta Vinci has lost 6-0, 4-6, 6-4 in the third round of the Australian Open to Anna-Lena Friedsam in her first Grand Slam tournament since beating Serena Williams in the U.S. Open semifinals.

Williams' loss to Vinci ended her bid for a calendar-year Grand Slam in 2015, just two wins short after claiming the titles at the Australian Open, French Open and Wimbledon.

After producing one of the biggest upsets ever in women's tennis, Vinci lost in the final to fellow Italian Flavia Pennetta.

Top-ranked Williams is still in contention in Melbourne, set to play her third-round match later Friday against Daria Kasatkina of Russia.

Friedsam had not advanced past the second round of six previous Grand Slams.

4:50 p.m.

Former finalist Jo-Wilfried Tsonga has advanced to the fourth round at Melbourne Park with a 6-4, 7-6 (7), 7-6 (4) win over fellow Frenchman Pierre-Hugues Herbert.

Tsonga and qualifier Herbert were two of the five French players into the third round from the 13 who started in the main men's draw.

Tsonga, the 2008 runner-up to Novak Djokovic, reached the round of 16 for the seventh time.

4:10 p.m.

Roger Federer and Grigor Dimitrov experienced a rarity at Rod Laver Arena – a rain delay.

Dimitrov had just held serve to start the match when rain began falling and the match was briefly suspended while the roof was closed. It had been closed for Maria Sharapova's earlier three-set win over American Lauren Davis, but it was re-opened for the start of the men's match Friday.

Ball boys and girls used towels to wipe off the court while Federer and Dimitrov took shelter under shades usually used to protect players from the sun.

After about a 15-minute delay, play resumed.

The rain has prevented play Friday on outdoors courts. Seven doubles matches have been postponed.

3:35 p.m.

Maria Sharapova steadied herself and overcame a feisty opponent to beat American Lauren Davis 6-1, 6-7 (5), 6-0 to reach the fourth round.

The five-time Grand Slam winner raced through the first set Friday in just 26 minutes, then struggled through a 77-minute second set before coming back in the third to earn her 600th career win.

Sharapova served 16 aces but made 42 unforced errors, compared to just 34 by her 103rd-ranked opponent.

The No. 5-seeded Sharapova faces Swiss teen Belinda Bencic in the next round and could meet top-ranked rival Serena Williams in the quarterfinals.

Sharapova hasn't beaten Williams since 2004, losing their last 17 meetings, including last year's Australian Open final.

3:15 p.m.

The rain is beginning to clear at Melbourne Park and tournament officials hope to get play on outside courts started.

Seven doubles matches have already been postponed until Saturday, and more could follow. Matches had been scheduled to begin at 11 a.m.

All but two of the 16 third-round men's and women's singles matches were scheduled Friday at the three stadiums which have roofs.

At Rod Laver Arena, the match between fifth-seeded Maria Sharapova and American Lauren Davis has gone to a deciding set after Sharapova won the first set 6-1 and Davis took the second-set tiebreaker 7-6 (5).

2:20 p.m.

Kei Nishikori has reached the fourth round for the fifth consecutive year with a 7-5, 2-6, 6-3, 6-4 win over Spain's Guillermo Garcia-Lopez.

The Japanese player had a medical timeout at the end of the first set for a problem with his wrist, but didn't look impeded as he closed out in the match in just under three hours.

He said after the match that after he got treatment, the wrist ''got better.''

The seventh-seeded Nishikori saved eight of 11 break points, including three at 5-3 in the third set when he was serving for a two-sets-to-one lead.

1:05 p.m.

Belinda Bencic has become the first player to advance to the fourth round at Melbourne Park with a 4-6, 6-2, 6-4 win over Kateryna Bondarenko in the opening match Friday on Rod Laver Arena.

With the roof closed and play on outdoor courts delayed because of to steady rain, the 12th-seeded Bencic overcame a slow start to dominate the final two sets of the 1 hour, 50-minute match.

Bencic, the first Swiss woman to advance to the final 16 here since Martina Hingis and Patty Schnyder in 2007, will play either fifth-seeded Maria Sharapova or American Lauren Davis in the next round.

Tournament officials said play would not be possible on outdoor courts until at least 2:30 p.m., and the rain was still falling at Melbourne Park.

11:35 a.m.

Rain has delayed the start of play Friday on outdoor courts at the Australian Open.

Play began on time at the three covered stadiums, including a third-round match between 12th-seeded Belinda Bencic of Switzerland and Kateryna Bondarenko of Ukraine on the main Rod Laver Arena.

Over on Margaret Court Arena, seventh-seeded and 2014 U.S. Open finalist Kei Nishikori was playing Guillermo Garcia-Lopez of Spain. At Hisense Arena, David Goffin played Dominic Thiem.

Defending champions Novak Djokovic and Serena Williams were set to play night matches Friday. The top-seeded Djokovic was scheduled to play Andreas Seppi while six-time champion Williams took on Daria Kasatkina of Russia.