Williams' injury scare

Williams is nervous about her French Open chances

Venus Williams is set to undergo further medical tests after pulling out of the Italian Open at short notice with a wrist injury.

Williams told WTA officials she could not continue just 30 minutes before her match with Anna Kournikova was due to start.

She blamed an injury incurred while picking up her bag at the airport on Sunday.

Tour physiotherapist Philippa Stewart said the injury was proving problematic to assess.

I was not able to hit the ball without pain

Venus Williams

"We're not quite sure what the injury is at the moment," she said.

"We are going to re-evaluate her and see if we can get a more definitive diagnosis on the situation."

Williams said that she had aggravated the injury during her morning practice session for the evening clash with Kournikova.

"I was OK, but it got worse through the day," she revealed.

"My wrist swelled up during the afternoon and I was not able to hit the ball without pain."

The injury comes at a bad time for Williams, with the French Open at Roland Garros just two weeks away.

"This is making me nervous about the French Open, now that I won't be able to play any tournaments for two weeks," she said.

But Williams does intend to make the most of the enforced break.

She said: "I will take some time off and finally see something of Rome."