Caroline Wozniacki has admitted that she expects a tough third-round match with 'good friend' Daniela Hantuchova at the Olympics on Wednesday.

The Danish eighth seed set up an encounter with the Slovakian thanks to a hard-fought victory over Belgium's Yanina Wickmayer on Monday.

"Daniela is one of my good friends as well. We practise quite a lot together in Monaco," the former world number one told reporters.

"It's going to be a tough match. She likes the grass, she likes the fast surfaces. Definitely not going to be easy."

Wozniacki has won three of her previous four meetings with Hantuchova.