As tennis fans recover from Roger Federer's stunning early exit from the Australian Open, play pushes into the weekend with plenty of top seeds remaining in competition. Who will be the next giant to fall?
The biggest question for American fans is what awaits the best U.S. players. In the men's draw, Steve Johnson has a major test against Japan's Kei Nishikori. Varvara Lepchenko also will need an upset to advance. And either Coco Vandeweghe or Madison Brengle will be knocked out in their match. Madison Keys aso has a challenge againt Petra Kvitova, the women's No. 4 seed.
Victoria Azarenka claimed the first big upset in women's competition when she KO'd Caroline Wozniacki. Entering her match Saturday, Azarenka could be the most dangerous player in the draw. Are Venus and Serena Williams vulnerable? How about David Ferrer on the men's side?
Those answers are coming as the Open heads towards its quarterfinals fields.
Here are Friday's results and Saturday's schedule of play. Because of the time difference between Melbourne and U.S. Eastern, next matches begin about 7 p.m. ET Friday. Saturday's night session in Melbourne begins about 3 p.m. ET.
Singles results
Men, third round
Tomas Berdych (7), Czech Republic, defeated Viktor Troicki, Serbia, 6-4, 6-3, 6-4.
Grigor Dimitrov (10), Bulgaria, defeated Marcos Baghdatis, Cyprus, 4-6, 6-3, 3-6, 6-3, 6-3.
Andreas Seppi, Italy, defeated Roger Federer (2), Switzerland, 6-4, 7-6 (5), 4-6, 7-6 (5).
Andy Murray (6), Britain, defeated Joao Sousa, Portugal, 6-1, 6-1, 7-5.
Bernard Tomic, Australia, defeated Sam Groth, Australia, 6-4, 7-6 (8), 6-3.
Kevin Anderson (14), South Africa, defeated Richard Gasquet (24), France, 6-4, 7-6 (3), 7-6 (6).
Nick Kyrgios, Australia, defeated Malek Jaziri, Tunisia, 6-3, 7-6 (6), 6-1.
Rafael Nadal (3), Spain, defeated Dudi Sela, Israel, 6-1, 6-0, 7-5.
Women, third round
Julia Goerges, Germany, defeated Lucie Hradecka, Czech Republic, 7-6 (6), 7-5.
Ekaterina Makarova (10), Russia, defeated Karolina Pliskova (22), Czech Republic, 6-4, 6-4.
Yanina Wickmayer, Belgium, defeated Sara Errani (14), Italy, 4-6, 6-4, 6-3.
Peng Shuai (21), China, defeated Yaroslava Shvedova, Kazakhstan, 7-6 (7), 6-3.
Eugenie Bouchard (7), Canada, defeated Caroline Garcia, France, 7-5, 6-0.
Irina-Camelia Begu, Romania, defeated Carina Witthoeft, Germany, 6-4, 6-4.
Simona Halep (3), Romania, defeated Bethanie Mattek-Sands, United States, 6-4, 7-5.
Maria Sharapova (2), Russia, defeated Zarina Diyas (31), Kazakhstan, 6-1, 6-1.
Saturday schedule
Varvara Lepchenko (30), United States, vs. Agnieszka Radwanska (6), Poland
Serena Williams (1), United States, vs. Elina Svitolina (26), Ukraine
Stan Wawrinka (4), Switzerland, vs. Jarkko Nieminen, Finland
Novak Djokovic (1), Serbia, vs. Fernando Verdasco (31), Spain
Petra Kvitova (4), Czech Republic, vs. Madison Keys, United States
Camila Giorgi, Italy, vs. Venus Williams (18), United States
Feliciano Lopez (12), Spain, vs. Jerzy Janowicz, Poland
Barbora Zahlavova Strycova (25), Czech Republic, vs. Victoria Azarenka, Belarus
David Ferrer (9), Spain, vs. Gilles Simon (18), France
Garbine Muguruza (24), Spain, vs. Timea Bacsinszky, Switzerland
Benjamin Becker, Germany, vs. Milos Raonic (8), Canada
Coco Vandeweghe, United States, vs. Madison Brengle, United States
Steve Johnson, United States, vs. Kei Nishikori (5), Japan