Roger Federer rallied past Denis Istomin 4-6, 6-3, 6-2 in the second round of the Swiss Indoors on Wednesday.
Stanislas Wawrinka lost in the first round of the Swiss Indoors on Tuesday, damaging his chances of playing in his first ATP World Tour Finals.
Former Grand Slam champions Ana Ivanovic and Samantha Stosur made the Kremlin Cup quarterfinals with straight-sets victories on Thursday to set up a rematch of last year's semifinal.
Fifth-seeded Mikhail Youzhny of Russia overcame an illness and reached the second round of the Thailand Open by beating Paolo Lorenzi of Italy 6-3, 6-2 on Wednesday.
Joao Sousa advanced to his first career ATP tour semifinal by beating fourth-seeded Dmitry Tursunov 6-4, 6-3 Friday at the St. Petersburg Open.
Top-seeded Fabio Fognini beat qualifier Dominic Inglot 6-4, 6-4 on Tuesday in the first round of the St. Petersburg Open.
James Blake upset No. 16 seed Jerzy Janowicz 6-1, 7-5 in the first round of the Western & Southern Open on Monday.
Wimbledon champion Andy Murray tumbled out of the Rogers Cup on Thursday, falling 6-4, 6-3 to Lavia's Ernests Gulbis in the third round.
Next week, for the first time in 40 years of ATP rankings, there will be no American men in the top 20.
Jack Sock was asked about his upcoming match with No. 11-ranked Kei Nishikori, a query that ended with high praise for Nishikori's level of play.
Top-seeded John Isner advanced to his fourth straight Atlanta Open semifinal Friday, beating James Blake 7-6 (1), 7-6 (5).
Top-seeded John Isner figured he would struggle in his first match Thursday in the Atlanta Open. He had no idea he would barely beat 19-year-old wild-card entry Christian Harrison 7-6 (9), 4-6, 7-5 to avoid an upset and reach the quarterfinals.
Ricardas Berankis reached the second round of the Nice Open by beating eighth-seeded Denis Istomin of Uzbekistan 6-2, 6-2 on Sunday.
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.
Wild-card entrant Philipp Petzschner advances into the quarterfinals of the Dallas Tennis Classic in Las Colinas.
Main-draw matches in the $125,000 Dallas Tennis Classic start Tuesday at the Four Seasons Resort and Club in Las Colinas with five players ranked in the world's top 50 in town this week.