Roger Federer was ousted by Kei Nishikori of Japan with a 6-4, 1-6, 6-2 loss Thursday in the third round of the Madrid Open.
Victoria Azarenka lost her temper, broke her racket and argued with the chair umpire in an exit Wednesday from the Madrid Open, where she's been runner-up the last two years.
Ekaterina Makarova and Elena Vesnina won the decisive doubles match Sunday as Russia completed a comeback victory over Slovakia to reach the Fed Cup final.
Former Wimbledon champion Petra Kvitova got out of the first round of the Dubai Championships for the first time in three visits by easily handling Daniela Hantuchova 6-2, 6-1 on Tuesday.
American Varvara Lepchenko won in her Fed Cup singles debut to lift the United States to a 1-1 tie against Italy on Saturday.
Li Na has advanced to the Australian Open semifinals with a 7-5, 6-3 victory over fourth-seeded Agnieszka Radwanska, ending the Polish player's 13-match winning streak to start the year.
Maria Sharapova beat Kirsten Flipkens 6-1, 6-0 on Sunday to continue a dominant and unparalleled run to the Australian Open quarterfinals.
Serena Williams returns to the WTA Championships with the Wimbledon and U.S. Open titles, plus the Olympic gold medal, yet with no chance of finishing the year as the No. 1 in the world.
Defending champion Dominika Cibulkova advanced to the second round of the Kremlin Cup, rallying to beat Ekaterina Makarova of Russia 2-6, 6-4, 6-2 Tuesday.
Two-time champion Novak Djokovic reached the China Open quarterfinals after dismissing Carlos Berlocq of Argentina 6-1, 6-3 on Wednesday.
Caroline Wozniacki has advanced to the finals of the Korea Open, beating Ekaterina Makarova of Russia 6-1, 5-7, 6-4 Saturday.
Caroline Wozniacki reached the semifinals of the Korea Open by defeating Klara Zakopalova of the Czech Republic 6-2, 6-3 Friday.
Caroline Wozniacki of Denmark cruised into the quarterfinals of the Korea Open on Thursday by beating Caroline Garcia of France, 6-2, 6-3.
Ekaterina Makarova of Russia and Bruno Soares of Brazil won the U.S. Open mixed doubles title Thursday.
Kim Clijsters hit her last shot as a pro tennis player into the net. Doubtful anyone will remember that, though.
Serena Williams reeled off the last eight games and reached the U.S. Open's fourth round with a 6-4, 6-0 victory Saturday over 42nd-ranked Ekaterina Makarova of Russia, who upset the American at the Australian Open in January.