MELBOURNE, Australia (AP) The latest from the Australian Open on Saturday (all times local):
Chinese qualifier Zhang Shuai's unexpected run continues in Australia. Zhang, who had considered retiring from the game a few months ago, has won her third main draw match at Melbourne Park, eliminating American Varvara Lepchenko 6-1, 6-3 to reach the fourth round.Before this year's Australian Open, Zhang had been 0-14 at the Grand Slam matches in her nine-year career. Now, she's 3-0 to start 2016.
Zhang's ranking had dropped to No. 200 last year after a string of losses, prompting her to contemplate walking away from the game. She thought the Australian Open might be her last tournament, so she brought her parents with her from China.
Zhang, who had an upset win over No. 2 Simona Halep in the second round, faces No. 15 Madison Keys next for a spot in the quarterfinals.
Ana Ivanovic has lost 4-6, 6-4, 6-4 to Madison Keys under difficult circumstances in a third-round match that was suspended for nearly an hour while her coach, Nigel Sears, was taken to hospital early in the second set at Rod Laver Arena.
The match was stopped at 1-0 in the second set when reports said Sears, father of Kim Sears, who is married to Andy Murray, slipped or fell on stairs near the coach's box.
It was not known if Murray was aware of his father-in-law's health issues while winning a match against Joao Sousa at nearby Margaret Court Arena, although he did not wait for the usual TV interview on court after the match. Media reports said he left Melbourne Park immediately after the match.
Ivanovic led 3-0 in the final set before allowing Keys to come back to win the match.
Four-time finalist Andy Murray is through to the round of 16 after beating Portugal's Joao Sousa at the Australian Open.
The second-seeded Murray converted six of nine breakpoint chances and served 13 aces in the 6-2, 3-6, 6-2, 6-2 victory. He's beaten Sousa all seven times they've played, including at the 2015 and 2013 Australian Opens.
Murray is trying to become the first man to win a Grand Slam after losing in four finals. He lost in the finals in 2010, 2011, 2013 and 2015.
Play has resumed between Ana Ivanovic and Madison Keys at Rod Laver Arena almost an hour after they stopped for a medical emergency reportedly involving Ivanovic's coach Nigel Sears, who is Andy Murray's father-in-law.
Pam Shriver says on ESPN that Sears had told members of Ivanovic's coaching team that he was not been feeling well about a half hour before he fell in the stands.
An Associated Press reporter saw medics strap a man, who appeared to Sears, to a stretcher and place an oxygen mask on his face before carefully carrying him out of the arena as scores of spectators stood and looked on.
Ivanovic was taken off the court as medics attended to the man in the stands for about 30 minutes. Murray's match continued without interruption on Margaret Court Arena.
For the second consecutive round, a medical emergency has caused Ana Ivanovic's match to be suspended at the Australian Open.
Ivanovic won the first set against American Madison Keys 6-4 and was ahead on serve 1-0 in the second when play was stopped. Medical teams were assisting with the emergency.
After about a 10-minute delay on Rod Laver Arena, both players returned to the dressing room. The stadium announcer said play would be suspended until medical teams could fully assist an injured spectator.
On Thursday, Ivanovic's second-round match with Anastasja Sevastova was delayed for 30 minutes when a woman fell down the some stairs in the same stadium and was taken away on a stretcher in a neck brace.
No offense, Vika, but John Isner has a comment about your ''dabbing.''
Isner, originally from North Carolina, is a big fan of the Carolina Panthers, the team where the so-called dab originated, courtesy of quarterback Cam Newton.
Fans at the Australian Open have seen Victoria Azarenka displaying a version of the ''dab'' to celebrate her victories into the fourth-round.
The No. 10-seeded Isner thinks she needs to work on it.
Without being asked for a critique, Isner offered one at his post-match news conference Saturday, saying that ''(Newton) does it the best. Vika's, no offense, is not quite as good as his.''
Isner served 44 aces on Saturday to clinch a 6-7 (8), 7-6 (5), 6-2, 6-4 win over Feliciano Lopez and secure a spot in the fourth round.
He confirmed he has no plans to celebrate with a ''dab'' - ''I won't be doing that for sure,'' Isner said.
David Ferrer is back in the round of 16 at the Australian Open for the sixth consecutive year.
The eighth-seeded Spaniard, who ended Australian veteran Lleyton Hewitt's career in the second round, overwhelmed Steve Johnson of the United States 6-1, 6-4, 6-4 on Saturday.
Ferrer broke Johnson four times in the match and never faced a break point on his own serve.
He'll next play another American, John Isner, in the fourth round.
Naomi Osaka's surprising run at Melbourne Park came to an end with a loss to two-time champion Victoria Azarenka in the third round, but the 18-year-old Japanese qualifier fully expects to be back on the big stage again soon.When asked about her future goals, Osaka replied, ''Oh, to be the No. 1 and to win a lot of Grand Slams and to play Fed Cup and then to play the Olympics and to be happy.''
That's a tall order. But Azarenka believes the big-hitting Osaka, who upset 18th-seeded Elina Svitolina in her Grand Slam main draw debut, has a bright future.
Azarenka said, ''She definitely surprised me with her play. ... I think she has a lot of potential, a lot of power. I'm sure we will see a lot more of her.''
Stan Wawrinka won his 400th tour-level match with a 6-2, 6-3, 7-6 (3) victory over Lukas Rosol in the third round at the Australian Open.
It's the fourth year in a row Wawrinka has made it to the fourth round at Melbourne Park. Last year as defending champion he lost in the semifinals to eventual champion Novak Djokovic.
The win moved French Open champion Wawrinka into a fourth-round match against Milos Raonic, who beat Viktor Troicki.
Angelique Kerber has advanced to the fourth round after beating Madison Brengle 6-1, 6-3.No. 7-seeded Kerber's win on Saturday makes her the highest-ranked player in the bottom half of the draw, following No. 3 Garbine Muguruza's loss earlier in the day.
Kerber, a two-time Grand Slam semifinalist, faces compatriot Annika Beck of Germany in the fourth round.
Kerber could meet two-time Australian Open champion Victoria Azarenka in the quarterfinals. Azarenka has a fourth-round match against Barbora Styrcova.
John Isner has aced his way back into the round of 16 at Melbourne Park, avenging a loss to 18th-seeded Feliciano Lopez in the same round on the same court four years ago.
The 10th-seeded Isner had three of his 44 aces in the last game to clinch a 6-7 (8), 7-6 (5), 6-2, 6-4 win over Lopez. Isner leads the tournament with 101 aces in three matches.
Lopez knocked Isner out of the Australian Open in a five-set, third-round match at Hisense Arena in 2012. Isner has only made the round of 16 at the tournament once before, in 2010.
Milos Raonic has dedicated his third-round victory at the Australian Open to victims of a shooting in Canada which left four people dead and at least two injured.
A gunman opened fire at the La Loche Community School in a remote aboriginal community in Saskatchewan, and at a second location.
After his win over Viktor Troicki on Saturday, the 25-year-old Canadian said, ''Today, before I stepped out on court it was a difficult day back home.''
His voice sounding emotional at times, Raonic added: ''Unfortunately in Saskatchewan in a very small community there was a shooting at a high school, so I want to take a moment and give thoughts to that community. Today's victory was for that community, and a quick recovery and all of Canada, and I'm sure the world is behind you.''
No. 13-seeded Milos Raonic has reached the fourth round at Melbourne Park for the fourth time, defeating Viktor Troicki 6-2, 6-3, 6-4 to advance.
Raonic trailed 4-1 in the third set before winning five consecutive games and the match. He set up match point with an ace, his 14th of the match, and clinched it when No. 21 Troicki hit a forehand long.
The match pitted the winners of the two Australian Open warmup tournaments - Raonic beat Roger Federer for the Brisbane International title and Troicki defeated Grigor Dimitrov in Sydney.
Last year as the No. 8-seeded player, Raonic had his best Australian Open result by reaching the quarterfinals and losing to eventual champion Novak Djokovic.
Victoria Azarenka has cruised into the fourth round with another quick victory, dispatching Japanese qualifier Naomi Osaka 6-1, 6-1 in 56 minutes.
The two-time Australian Open champion, seeded 14th this year, has lost just five games in three matches so far at Melbourne Park.
Azarenka had 24 winners to only four for Osaka, who was making her Grand Slam main draw debut.
Azarenka said after the match, ''It wasn't easy for sure, especially when you don't know who you play. ... She's a little unpredictable and she surprised me with her game.''
Azarenka next faces Barbora Strycova, a straight-sets winner over the No. 3 seed, Garbine Muguruza earlier Saturday.
Third-seeded Garbine Muguruza has become the latest casualty in the women's draw at Melbourne Park, beaten by Barbora Strycova 6-3, 6-2 in the day's first match on Rod Laver Arena.
Muguruza misfired frequently on her groundstrokes, finishing with 32 unforced errors, and looked a bit listless throughout the match.
Since reaching last year's Wimbledon final, the Spanish player has lost in the second round of the U.S. Open and now the third round at Melbourne Park.
Strycova has only been past the third round once before in 38 Grand Slam appearances when she reached the quarterfinals of Wimbledon in 2014.
No. 2 Simona Halep, No. 6 Petra Kvitova and No. 8 Venus Williams have also been eliminated from the tournament.
Johanna Konta has become the first British woman to reach the fourth round at the Australian Open in 29 years.
Konta beat No. 8 Venus Williams in straight sets in the first round and on Saturday had another straight-sets win over Denisa Allertova, 6-2, 6-2.
The 47th-ranked Konta is making her debut in the main draw at Melbourne Park but has shown few jitters and a fighting spirit as she moves through the draw.
Konta said she knew what to expect from Allertova, who stretched her to three sets in the first round at last year's French Open.
The 22-year-old Konta was born in Australia and became a British citizen in 2012, making her the first British woman to reach the round of 16 at Melbourne Park since Jo Durie in 1987.