London:Sania Mirza's Wimbledon campaign ended on Wednesday after she and Bethanie Mattek lost to Williams sisters Venus and Serena in straight sets in the quarterfinals here.
The 13th seeded Indo-American pair lost 4-6, 3-6 to their more fancied 11th seeded opponents.
The quarterfinal appearance though was Sania's best performance in Wimbledon.
Sania and Mattek were in even terms with their opponents for a while in the first set but the American sisters' better serve and power tennis finally caught up with the Indo-American pair who ran out of steam in the second set to lose the match in 86 minutes.
Sania had already crashed out of the singles and mixed doubles competition -- pairing with Mahesh Bhupathi - losing in the second round in both the events.