Second-seeded Annika Beck of Germany overcame 12 double-faults to beat Shahar Peer 7-5, 6-3 in the first round of the Gastein Ladies on Tuesday.
Top-seeded Sara Errani beat Barbora Zahlavova Strycova at the Italiacom Open again, this time to reach the quarterfinals on Wednesday.
It was a day of devastating attrition as players pulled out of Wimbledon in record fashion.
Second-seeded Victoria Azarenka has pulled out of Wimbledon after hurting her right knee in her opening-round win.
Maria Sharapova and Victoria Azarenka won their first-round matches in dramatic, straight sets, but the real action was in their news conferences afterward.
Seven-time champion Roger Federer could face Rafael Nadal in the quarterfinals at Wimbledon -- their earliest meeting in any Grand Slam.
Melanie Oudin's defense of her Aegon Classic title lasted only 57 minutes Monday, with the American losing 6-3, 6-1 to Croatian qualifier Ajla Tomljanovic in the first round.
Sixth-seeded Benoit Paire of France beat Igor Sijsling of the Netherlands 7-6 (5), 6-3 Monday in the opening round of the Portugal Open.