Fernando Verdasco advanced to the third round of the Paris Masters by beating 15th-seeded Gilles Simon 6-3, 3-6, 6-4 Tuesday.
American qualifier Sam Querrey reached the second round of the Paris Masters by beating 2012 runner-up Jerzy Janowicz 6-7 (5), 6-2, 6-4 Monday.
Top-seeded David Ferrer powered his way past Andreas Seppi 6-3, 7-5 to reach the second round of the Valencia Open on Wednesday.
Tommy Robredo advanced to the second round of the Valencia Open by beating fifth-seeded John Isner 7-6 (3), 6-3 on Tuesday.
Top seed and former champion Tomas Berdych beat Dustin Brown of Germany 7-5, 6-3 to reach the quarterfinals of the Stockholm Open on Thursday.
Top-seeded Milos Raonic of Canada was eliminated in his first match at the Kremlin Cup on Thursday, losing 6-3, 4-6, 6-3 to Lithuanian qualifier Ricardas Berankis.
Defending champion Grigor Dimitrov advanced to the quarterfinals of the Stockholm Open by defeating Russia's Teymuraz Gabashvili 7-5, 7-6 (4) on Wednesday.
Philipp Kohlschreiber made a winning return from a four-week injury layoff Wednesday, rallying to defeat Carlos Berlocq of Argentina 3-6, 6-1, 6-4 in the second round of the Erste Bank Open.
Second-seeded Alize Cornet of France went out in the second round of the Luxembourg Open after losing 6-2, 6-3 to Kiki Bertens of the Netherlands on Wednesday.
Fernando Verdasco is through to the second round of the Stockholm Open after beating Marinko Matosevic of Australia 6-3, 3-6, 6-3 on Tuesday.
Fifth-seeded Roberto Bautista Agut of Spain beat local favorite Andrei Kuznetsov 6-3, 6-4 Monday to reach the second round of the Kremlin Cup.
Sixth-seeded Roberta Vinci of Italy reached the second round at the Luxembourg Open with a 6-1, 6-3 win over Tereza Smitkova of the Czech Republic on Monday.
Top-seeded Jelena Jankovic was upset by Zheng Saisai of China 6-3, 6-3 in the second round of the Tianjin Open on Thursday.
Second-seeded Madison Keys of the United States advanced to the second round of the Japan Women's Open by beating Sachia Vickery 6-3, 6-3 Monday.
Fourth-seeded Kei Nishikori of Japan beat Ivan Dodig of Croatia 6-3, 6-4 to advance to the second round of the Japan Open on Wednesday.
Japanese wildcard entry Tatsuma Ito upset Australian Open champion Stan Wawrinka 7-5, 6-2 on Tuesday to advance to the second round of the Japan Open.