Carlos Berlocq of Argentina and Martin Klizan of Slovakia won three-setters to reach the second round of the Open de Nice on Tuesday.
Sixth-seeded Andreas Seppi was knocked out of the first round of the Nastase Tiriac Trophy on Tuesday, along with seventh-seeded Nicolas Mahut.
Sixth-seeded Federico Delbonis of Argentina beat Gilles Simon of France 6-4, 6-4 in the first round of the Grand Prix Hassan II on Tuesday.
Fourth-seeded Tomas Berdych lost his first match of the season Monday, falling to Ivo Karlovic 7-6 (6), 7-6 (4) at the Qatar Open.
Carla Suarez Navarro advanced to the second round of the Kremlin Cup with a 6-4, 6-3 victory over Russia's Vera Dushevina on Tuesday.
It's good to be a big man in tennis these days -- well most of the time.
The stars and stripes of men's tennis have not fared well in a decade. John Isner and Sam Querrey hope to change that.
Two-time former champion Tommy Robredo lost to Spanish compatriot Albert Ramos 6-3, 6-4 Wednesday at the Swedish Open.
Spain's Fernando Verdasco and Viktor Troicki of Serbia won in straights sets Tuesday as they advanced to the second round of the Swedish Open.
Second-seeded Kevin Anderson of South Africa advanced to the quarterfinals of the Grand Prix Hassan II, beating Spanish qualifier Pablo Carreno-Busta 6-3, 6-3 on Thursday.
Third-seeded Stanislas Wawrinka of Switzerland defeated Paolo Lorenzi 6-3, 6-3 on Tuesday to reach the second round of the Copa Claro clay court tournament in Buenos Aires.
Rafael Nadal overcame a poor start and a difficult third set to advance to the Brazil Open semifinals, beating Carlos Berlocq of Argentina 3-6, 6-4, 6-4 on Friday night.
Rafael Nadal's knee held up for a third straight day as he won a doubles match at the VTR Open on Thursday.
Sam Querrey of the United States defeated Feliciano Lopez 6-3, 7-6 (4) Tuesday at the Valencia Open.
Top-seeded Philipp Kohlschreiber of Germany will take on defending champion Robin Haase of the Netherlands in Saturday's final of the Bet-at-Home Cup.
Top-seeded Philipp Kohlschreiber of Germany won twice to reach his fifth semifinal of the season at the Bet-at-Home Cup on Thursday.