The Texas Open lost its top seed on Monday after Angelique Kerber was forced to withdraw because of injury
Barely 24 hours after losing the Western & Southern Open final in Cincinnati in three sets to Li Na, the German pulled out with a sore left shoulder.
With the final Grand Slam of the year, the US Open, only a week away, the world number six opted to sit out the hardcourt tournament at Grapevine.
“I mean I would love to play here. That’s why I’m here,” said Kerber.
She added: “Last night was not so good, so that’s why I decided to withdraw and to focus on the US Open.”
In Kerber’s absence, second seed Jelena Jankovic provided plenty of entertainment for the crowd as she required three sets to see off Yaroslava Shvedova in the opening round.
The former world number one came from a set down to beat the Kazakh player 6-7 (7-9) 7-6 (7-4) 6-1.
Third-seeded Italian Roberta Vinci of Italy beat Hsieh Su-wei of Taiwan 6-2 6-2 and sixth-seeded Peng Shuai needed three sets to beat Ayumi Morita of Japan 4-6 6-0 6-3.
British duo Anne Keothavong and Emily Webley-Smith crashed out as they went down against Marina Erakovic and Mirjana Lucic respectively.
Keothavong lost 6-1 5-7 7-6 (11-9) against Erakovic from New Zealand while Croatian qualifier Lucic claimed a 6-1 6-2 win over Webley-Smith.