Former world number one women's tennis player Caroline Wozniacki has reportedly fired her coach after losing her top ranking.

Trainer Ricardo Sanchez was fired just two months after landing the job with Wozniacki. The Danish star is now ranked number four after losing to Belgian Kim Clijsters in the Australian Open quarter-final, Xinhua reports.

Wozniacki's father and her former coach Piotr Wozniacki believes she didn't get anything new from Sanchez, and both found it difficult to cooperate with each other. "Caroline does not believe she got fresh impetus out of it," said Piotr Wozniacki.