Former champion Maria Sharapova was knocked out of Wimbledon in a stunning second-round upset Thursday by a 154th-ranked Russian, marking her earliest exit from a Grand Slam tournament since her first full season on tour in 2003. Her game littered by double faults and ugly unforced errors, the third-seeded Sharapova slumped to a 6-2, 6-4 loss to 20-year-old Alla Kudryavtseva on Court 1. "She had nothing to lose," Sharapova said. "She went for her shots. I can’t be really happy about anything today." Sixth-seeded Andy Roddick also was upset in the second round, losing to Janko Tipsarevic of Serbia. Roddick, who lost the 2004 and 2005 Wimbledon finals to Roger Federer, was beaten 6-7 (5), 7-5, 6-4, 7-6 (4) by 40th-ranked Tipsarevic, who has never gone past the fourth round at a major. Roddick reached the semifinals at the grass-court tuneup event at Queen’s, coming back from a shoulder injury that forced him out of the French Open. He had three set points in the fourth to pull even and eight breakpoint chances overall, but Tipsarevic saved them all. Sharapova, the 2004 Wimbledon champion at age 17, hadn’t lost so early in a Grand Slam since going out in the first round at the Australian and French Open and second round at the U.S. Open in 2003. Sharapova is the second marquee player eliminated in as many days. But her defeat to a little-known player with a career Grand Slam record of 4-5 was a much bigger shock than No. 3-ranked No ...