John Isner of the United States edged Ernests Gulbis of Latvia 7-6 (4), 7-6 (2) Wednesday at the Valencia Open.
Radek Stepanek of the Czech Republic outlasted Lukas Lacko of Slovakia 7-6 (4), 5-7, 7-6 (5) Wednesday to reach his second quarterfinal of the season at the Erste Bank Open.
Juan Martin del Potro and Jo-Wilfried Tsonga closed in on qualifying for the ATP Finals with quarterfinal victories at the Shanghai Masters on Friday.
Top-ranked Novak Djokovic and Serena Williams advanced with straight-set victories Tuesday at the China Open, while Venus Williams was eliminated.
Top-seeded Jo-Wilfried Tsonga will aim for his third straight Open de Moselle title when he plays Gilles Simon in an all-French final on Sunday, with both players chasing their 11th career title.
Top-seeded Jo-Wilfried Tsonga stayed on course for his third straight Open de Moselle title by beating Germany's Tobias Kamke 4-6, 6-3, 6-4 to reach the semifinals on Friday.
Nicolas Mahut of France upset third-seeded Andreas Seppi of Italy 6-4, 6-4 Thursday to reach the Moselle Open quarterfinals.
Defending champion Andy Murray eased into the US Open's fourth round with a straight-set victory, improving to 29-2 over his past five Grand Slam tournaments.
Maria Sharapova's return to WTA tournament play after more than a month away was short-lived following an upset loss to 17th-ranked American Sloane Stephens 2-6, 7-6 (5), 6-3 in the second round of the Western & Southern Open on Tuesday.
Next week, for the first time in 40 years of ATP rankings, there will be no American men in the top 20.
Fifth-seeded Tommy Robredo cruised into the second round of the Croatia Open on Tuesday, beating Jan Hajek 6-3, 6-2.
Top-seeded Roger Federer struggled for a 7-6 (4), 3-6, 7-5 victory Friday over Florian Mayer and a place in the semifinals of the German Tennis Championships.
Top-seeded Roger Federer cruised past Czech qualifier Jan Hajek 6-4, 6-3 Thursday to reach the German Tennis Championships quarterfinals.
Third-seeded Nicolas Almagro of Spain advanced to the third round of the German Championships by defeating Tobias Kamke of Germany, 6-3, 6-3 on Tuesday.
Michael Berrer of Germany advanced to the quarterfinals of the Mercedes Cup by beating third-seeded Jeremy Chardy of France 6-2, 6-7 (1), 6-3 on Wednesday.
Gael Monfils of France defeated compatriot Paul-Henri Mathieu 7-6 (0), 6-4 on Tuesday to advance to the second round of the Mercedes Cup.