Philipp Kohlschreiber began the defense of his Gerry Weber Open title with a win over wild card Dustin Brown in an all-German matchup Monday.
Eighth-ranked Mardy Fish became the first high seed on the men's side to lose, falling 7-6 (4), 6-3, 7-6 (6) to Colombia's Alejandro Falla.
Top-seeded Jo-Wilfried Tsonga overcame an error-prone start to defeat Xavier Malisse 4-6, 7-6 (4), 6-4 Friday at the Erste Bank Open and reach his eighth semifinal of the season.
Alex Bogomolov Jr. upset No. 7 seed Grigor Dimitrov of Bulgaria 6-4, 6-3 and fourth seed Thomaz Bellucci of Brazil beat Columbia's Alejandro Falla on Thursday to set up a quarterfinals meeting at the Farmers Classic.
No. 1 seed Mardy Fish opened up defense of his title in the Atlanta Tennis Championships with a 6-3, 6-3 third-round victory over Nicolas Mahut of France.
Top-seeded Robin Soderling moved into the quarterfinals of the Open 13 tournament with a 7-6 (8), 7-6 (5) victory over wild-card entry Nicolas Mahut.
Eighth-seeded Juan Ignacio Chela routed top-seeded Nikolay Davydenko 6-2, 6-1 to reach the Croatia Open semifinals.
Top-seeded Flavia Pennetta was ousted by Masa Zec Peskiric 6-3, 4-6, 7-6 (4) in the first round of the Copa Colsanitas on Tuesday.
German qualifier and world No. 125 Philipp Petzschner completed a remarkable week's tennis on Sunday when he beat French eighth seed Gael Monfils 6-4, 6-4 in the Vienna Open final.
Eighth-seeded Oscar Hernandez beat No. 3 seed Mardy Fish 6-2, 7-6 (5) Friday to move into the semifinals of the U.S. Men's Clay Court Championship.
Top seeds David Nalbandian and Flavia Pennetta advanced to the semifinals of the Mexican Open.
Andy Murray pulled out of Wimbledon on Sunday, saying he had not fully recovered from a wrist injury.
Men's eighth seed James Blake went out in the second round after firing an ace to save a match point, then having treatment for a wrist injury in his struggle with Frenchman Florent Serra.
Sixth seed Daniela Hantuchova of Slovakia and eighth seed Francesca Schiavone of Italy marched into the second round of the $1.3 million Qatar Open on Monday.
Alberta Brianti upset third-seeded Yuliana Fedak 6-4, 6-2 Tuesday to advance at the Sunfeast Open.
South Korea's Lee Hyung-Taik gave Asian pride a boost by dumping top seed and third-ranked Ivan Ljubicic out of the China Open quarter-finals 6-3, 7-6 (3) on Friday.