Wickmayer takes down Kai-chen

Fifth-seeded Yanina Wickmayer of Belgium beat Chang Kai-chen of Taiwan 7-5, 2-6, 7-5 in the first-round of the Bank of the West Classic on Monday.

Fifth-seeded Yanina Wickmayer of Belgium beat Chang Kai-chen of Taiwan 7-5, 2-6, 7-5 in the first-round of the Bank of the West Classic on Monday.

Wickmayer, who reached the third round at Wimbledon, is looking for her first WTA title this year and the fourth of her career. She reached the quarterfinals at Stanford two years ago.

Chang played her first main-draw match in a month..

Also, sixth-seeded Chanelle Scheepers beat qualifier Grace Min 6-4, 6-4, and Michelle Larcher De Brito defeated Australia's Jarmila Gajdosova 5-7, 6-2, 6-3.

Britain's Heather Watson stopped American Sloane Stephens, 7-6(5), 4-6, 6-1. The 19-year-old Stephens was the youngest player in the field. Serena Williams, who plays her first match on Wednesday, is the oldest at 30.

American Coco Vandeweghe - who failed to make it out of the qualifying tournament but made the main draw when Bojana Jovanovski was injured - beat Melinda Czink of Hungary 6-4, 6-1.

Canadian Stephanie Dubois was forced out of the tournament with a foot injury and seventh-seeded Petra Martic withdrew with an injury.

Both Watson and Stephens celebrated their career high singles ranking on Monday. Watson entered play ranked No. 79 after reaching the third round at Wimbledon.

''It's tough playing someone who is your friend,'' Watson said. ''I still think we gave it our all. I've played Sloane three times and all three times it has gone three sets.''

Stephens was ranked No. 49 after also reaching the third round in England. She reached the round of 16 at the French Open.