Magdalena Maleeva of Bulgaria has upset top seed and world number two tennis player Venus Williams of the United States at the Kremlin Cup tournament in Moscow.
Maleeva overcame a first-set loss to beat Williams in Thursday's second round match 2-6, 6-1, 7-6. Venus was playing in her first tournament since losing the U.S. Open final to her younger sister Serena last month.
Meanwhile, organizers say hometown favorite Anna Kournikova has withdrawn from the tournament because of an injury to her left ankle. Women's Tennis Association officials say the injury will probably force her to miss the rest of the year. She missed most of the season suffering from a stress fracture in the same foot.
Kournikova, known more for her beauty and long blonde hair than her prowess on the court, has never won a singles title in 116 professional tournaments.
On the men's side, fifth-seeded Roger Federer of Switzerland defeated Jarkko Nieminen of Finland in straight sets, 6-1, 6-4. Number seven seed Sjeng Schalken of the Netherlands beat South African Wayne Ferreira in straight sets, 7-5, 6-0.
Cyril Saulnier of France reached the third round with a straight set win over Bohdan Ulihrach of the Czech Republic 6-3, 6-2. Rainer Schuettler of Germany ousted Sweden's Jonas Bjorkman in straight sets, 6-1, 6-3.