Players will allowed to question more line calls at the year's first Grand Slam.
Medvedev moved a step closer to a potential semi-final showdown with Novak Djokovic at the Australian Open warm-up event.
A round-up of all tennis action on Saturday.
Despite testing positive, the Grand Slam's tournament director said he will be allowed to play in the year's first Grand Slam event.
'I think at 9pm we went on court and we served a lot and he gave me some tips about what should I focus on during the game. My coach was there. We had a nice conversation. I'm really thankful to him because that's what helped me today.'
Roger Federer will make his only appearance on clay this season at Roland Garros, his agent said. The Swiss skipped the entire claycourt season in 2017 and 2018 and last year played only two tournaments on the surface before arriving in Paris for the French Open.
Roger Federer is practising pain-free after undergoing two knee surgeries this year and says he expects to return to the circuit at the Australian Open in January.
Australian Open champion Marat Safin withdrew from the Hopman Cup in Perth due to a long-standing knee injury
"She played some incredible points on match point, she reminded me a bit of myself," said Williams after the match.
Martina Hingis played spoilsport at the Australian Open on Monday by denying China another entry into the record books.
Fourth seed Kim Clijsters overcame a late wobble to beat Slovakian Daniela Hantuchova 6-1 7-5 on Monday and set up a mouth-watering Australian Open quarter-final against Martina Hingis.
Andy Roddick and Serena Williams scored contrasting wins to enter the Australian Open quarterfinals.
China's Na Li kept the Asian interest alive as she beat ninth seed Dinara Safina 6-2, 6-2.
He now faces Serbian 14th seed Novak Djokovic for a place in the Australian Open quarter-finals.
Mauresmo stayed on course to defend her Australian Open title with a 6-3, 6-1 win over Czech Eva Birnerova in the third round on Friday.
Australian Open organisers are on high alert amid fears ethnic clashes between Serbs and Croats that marred the opening day of the Grand Slam could erupt again.
The world number two believes he is ready to claim his maiden Australian Open crown.
The world number one eased past Russia's Marat Safin at the Kooyong Classic invitational event on Thursday.
It was back in 2003 that Serena Williams first stamped her name on Australian Open history, the then 21-year-old taking down sister Venus to bring home her first title on the blue courts of Melbourne Park.
Serena Williams battled a misbehaving serve and scorching heat but stayed cool under pressure in a 7-5, 6-4 win over Czech Barbora Strycova to reach the Australian Open quarter-finals on Monday.
Britain's Johanna Konta has learned much from matches against Grand Slam champions and former world number ones over the last 18 months but on Wednesday her education will be complete when she faces Serena Williams in the Australian Open quarter-finals.
Participating at a fifth Olympics featured prominently in Federer's agenda, and the postponement of the Tokyo Games by a year due to the COVID-19 pandemic worked perfectly for the Swiss, who would otherwise have missed it due to injury.
Like a stern headmaster, a clearly irritated Rafael Nadal beckoned Lorenzo Sonego to the net and gave him an earful about the etiquette of tennis in front of 15,000 wide-eyed fans and a global audience of millions.
Agassi and Mauresmo, both seeded fourth, hammered their way into the third round of the opening Grand Slam of the year.
After two years of injury frustration and bouts of depression, Victoria Azarenka is hoping a little bit of motorcycle riding and some street art will change people's perceptions and help her to a third Australian Open title. The 26-year-old Belarusian is one of the favourites for the year's opening grand slam that starts on Monday after proving her fitness following a nagging foot injury that has restricted her appearances over the past two years. Now injury free and fresh off her first title since August 2013 at the Brisbane International last week, she is looking forward to the courts she made her own in 2012 and 2013.
The former French Davis Cup hero Nicolas Escude and 15-year-old Tatiana Golovin have been given wildcard entries to next year's Australian Open.
Second seed Andy Murray of Great Britian edged past Canadian Milos Raonic to set up a high-voltage final against World No. 1 Novak Djokovic at the Australian Open in Melbourne, on Friday.
Fernando Verdasco sent shockwaves through the Australian Open on Tuesday by defeating Rafael Nadal 7-6(6), 4-6, 3-6, 7-6(4), 6-2 to send the former world number one crashing out in the opening round.
After booking a much-anticipated semi-final with his Australian Open title usurper Stan Wawrinka on Wednesday, Novak Djokovic wasted little time reminding the Swiss of the heavy burden of being defending champion.
Lleyton Hewitt believes the surface at the Australian Open's Melbourne Park is hindering the country's chances of producing a local champion.
Playing in his first competitive singles match on the ATP Tour since August 5, the 20-times Grand Slam champion showed no signs of rust in his second round win against Lithuanian qualifier Ricardas Berankis.
Meet the winners of The Comedy Wildlife Awards 2023.
Serena Williams, with 21 grand slam titles in her trophy cabinet, thinks she has nothing left to prove to anyone and just wants to have fun for the remainder of her career.
Nadal said his back was still bothering him against world number 56 Djere