Caroline WozniackiWorld No. 1 Caroline Wozniacki has reached the quarter-finals of the 2011 Australian Open in Melbourne with a straight sets win over No. 46 ranked Anastasjia Sevastova, 6-3, 6-4.

Wozniacki, 20-years-old, double-faulted to give up a break in the first game and trailed Sevastova 3-1 before sailing through the next six games.

Sevastova, also 20-years-old, fought back to 4-4 after being a break down in the second set, but served up two unforced errors to hand it straight back and Wozniacki sealed the match after whipping a cross-court forehand winner.

This is the farthest Wozniacki has advanced in the Australian Open in four tries. In 2010 she reached the 4th round.

Wozniacki, who has not dropped a set at the tournament, will next play No. 6 seed, French Open winner Francesca Schiavone, or two-times Grand Slam champion No. 23 seed, Svetlana Kuznetsova.