Top-seeded Azarenka loses at French Open

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Victoria Azarenka of Belarus closes her eyes after missing a return in her fourth round match against Dominika Cibulkova of Slovakia at the French Open tennis tournament in Roland Garros stadium in Paris, Sunday June 3, 2012. Cibulkova won in two sets 6-2. 7-6. (AP Photo/Christophe Ena)

PARIS (AP) — Top-seeded Victoria Azarenka has been knocked out in the fourth round of the French Open, losing 6-2, 7-6 (4) to 15th-seeded Dominika Cibulkova of Slovakia.

Azarenka, the Austrailian Open champion, fell behind early and couldn't get any sense of control in this match. She vented her frustration in the second set, slamming her racket to the ground, then smashing it again while during a changeover. The chair umpire gave Azarenka a warning for racket abuse.

Cibulkova, who reached the semifinals at Roland Garros in 2009, had pushed Azarenka to a third set in their five previous matches but hadn't beaten her since 2008 at Amelia Island — the last time they met on clay.