Second-seeded Tommy Robredo opened defense of his ATP Polish stop championship with a straight-set win Tuesday at the $670,000 Warsaw Open.
Nikolay Davydenko and David Ferrer claimed second-round wins Tuesday at the $2.95 million Master Series Hamburg tennis tournament in Germany.
Third-seeded Novak Djokovic needed a third set but still advanced Thursday to the quarterfinals of the $3.5 Italian Masters clay court tennis tournament.
World No. 2 Rafael Nadal lost Wednesday for just the second time in 105 claycourt matches, falling in straight sets at the $3.5 million Italian Masters.
Former World No. 1 Marat Safin of Russia and Richard Gasquet of France were upset Monday in the first round of the $3.5 million Italian Masters.
Frenchman Gael Monfils and Germany's Mischa Zverev were among first-round winners Monday in the Valencia Open in Spain.
Sixth-seeded Igor Andreev and No. 8 seed Filippo Volandri advanced past the second round Thursday at the Copa Telmex.
Spain advanced to the Davis Cup quarterfinals Sunday, completing a 5-0 shutout of Peru in matches at Lima.
Carlos Berlocq reached the quarterfinals of the Movistar Open Thursday with a three-set win over defending champion Luis Horna in Vina del Mar, Chile.
Top-seeded Chilean Fernando Gonzalez advanced Tuesday in first-round play at the Movistar Open, the ATP's first clay-court event of 2008.