Denmark's Caroline Wozniacki beat Spain's Carla Suarez Navarro in a tough three-set encounter to enter the semi-finals of the Australian Open in Melbourne. Wozniacki won the first set easily 6-0 but lost the second set in a tie-breaker 6-7(3-7), but came back strongly to win the final set 6-2. The Danish players committed just three unforced errors but lost her way in the second set. The second seed, however, came back strongly in the final set to finish the game. "Another semi-final here, I'm excited," Wozniacki said after a marathon two-hour battle.