Wozniacki: Nadal parody 'a bit of fun'

World number one Caroline Wozniacki has apologised for any offence caused after she aped Rafael Nadal's cramping episode in her press conference at the US Open last night.

The Spaniard stunned the watching media as, while discussing his third-round victory over David Nalbandian on Sunday, he was struck by what was clearly severe pain in his right thigh before sliding onto the floor.