In the Wimbledon Tennis Championships in London, top-seeded Russian Player Maria Sharapova was knocked out of the tournament yesterday, losing 6-4, 6-3 to Sabine Lisicki in the fourth round of Women's Singles just a month after completing a career Grand Slam.Also advancing were four-time women's winner Serena Williams, defending champion Petra Kvitova and second-seeded Victoria Azarenka, but four-time Grand Slam champion Clijsters lost in what she says is her final Wimbledon before retirement later this year.In men's play, six-time champion Swiss payer Roger Federer was the first to reach the quarters, beating Belgium's Xavier Malisse 7-6, 6-1, 4-6, 6-3. Top seed Serbian Novak Djokovic sauntered into the quarter-finals with a 6-3, 6-1, 6-3 demolition of countryman Viktor Troicki yesterday. Several matches were postponed yesterday due to rain.