Serena holds firm as Clijsters, Venus shown exit

LONDON,  (Reuters) – Serena Williams was left all  alone trying to crush an unlikely uprising on Wimbledon’s  hallowed lawns yesterday as sister Venus and Kim Clijsters  suffered shock defeats in the women’s quarter-finals.

By the time defending champion Williams stepped on Centre  Court before beating China’s Li Na 7-5 6-3, Venus had been  thumped by Bulgaria’s Tsvetana Pironkova and Clijsters, seen as  the main obstacle to another Saturday sister act, had crumbled  to a three-set defeat against 21st seed Vera Zvonareva.

World number 82 Pironkova, who charmed the Court One crowd  during a dazzling 6-2 6-3 defeat of Venus, will face 21st seed  Zvonareva in the last four with the prize of a first appearance  in a grand slam final tantalisingly close for both.

Serena, now overwhelming favourite to claim a fourth  Wimbledon title and a 13th major crown, will direct her  considerable firepower at Petra Kvitova in the other semi-final  after the unseeded Czech saved five match points to beat  Estonian qualifier Kaia Kanepi 4-6 7-6 8-6.