Sara Errani has insisted that she does not have a preferred opponent for her French Open semi-final.

The Italian is due to face either world number one Serena Williams or Svetlana Kuznetsova on Thursday, with the winner then moving through to Saturday's final.

However, when asked which player she would rather come up against after her win over Agnieszka Radwanska this afternoon, the 26-year-old insisted that both would be "tough" to face.

"There was a lot of tension. I've never had to defend so many points, so it was very tough but I'm very happy. I don't have a preference. It will be tough in both cases," she said during her post-match interview.

Errani lost last year's final at Roland Garros to Maria Sharapova.