Federer rues missed chances in Tsitsipas thriller
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.
Following is a list of Serena Williams' 23 grand slam singles titles after the American surpassed Steffi Graf's professional era record with victory at the Australian Open on Saturday:
Roger Federer held firm against a furious fightback from fellow Swiss Stanislas Wawrinka, edging his former apprentice 7-5, 6-3, 1-6, 4-6, 6-3 in a Melbourne Park classic to reach the final of the Australian Open on Thursday.
Serena and Venus Williams rolled back the years as they swept through their last four clashes to set up a retro family final at the Australian Open on Thursday, their ninth meeting in a grand slam title-decider.
Before the tournament, top seed Djokovic declared the three should be favourites to win the Slams, and Federer agreed when asked after his Evans match.
The world number one, who missed the Australian Open last year, posted a 6-2, 6-2 win against Japan's Aiko Nakamura.
Since having a child and returning to the WTA Tour Serena Williams's focus has been split between raising a family and work.
Rafael Nadal overcame a temporary blip on his way to victory at the ATP Cup on Saturday
Images from Day 1 of the Australian Open, in Melbourne, on Monday.
Australian Open holder Djokovic will make his ATP Cup debut for Serbia against South Africa in Brisbane on Saturday while Nadal will lead Spain into action against Georgia in Perth on the same day.
Novak Djokovic held off a Roger Federer fightback as he reached the final of the Australian Open for the fifth time in six years. Poland's Agnieszka Radwanska was taken apart 6-0 6-4 by the reigning women's champion Serena Williams.
Davenport, who was beaten in last year's final by Serena Williams, remains on course for a quarter-final meeting with 10th seed Venus Williams or eighth seed Justine Henin-Hardenne of Belgium.
Australian Open champion Marat Safin withdrew from the Hopman Cup in Perth due to a long-standing knee injury
Serena Williams sounded a warning for her fellow Australian Open contenders with a sleek win
Last week, Court wrote an open letter to Qantas Airlines opposing their support of same-sex marriage and her beliefs were condemned by several current and former players, including Australia's Samantha Stosur, Nick Kyrgios and Jaimee Fourlis.
Newly crowned Australian Open champion NOvak Djokovic was not short of energy as he overpowered Andy Murray to claim his sixth Australian Open title.
Despite testing positive, the Grand Slam's tournament director said he will be allowed to play in the year's first Grand Slam event.
The seventh seeds overcame the Czech pair of Lukas Dlouhy and Pavel Vizner 7-5, 6-3
Maria Sharapova-led Russian brigade captured four of the round of 16 berths at the Australian Open on Friday
