Former U.S. Open champion Andy Roddick [ Images ] has pulled out of this week's Nice Open with a shoulder injury and may not be fully fit for the French Open [ Images ] starting on Sunday.

"It is not ready to play yet, I hurt it last week in Rome," the American world number 11 said in a video on the Nice Open official website (www.opennicecotedazur.com) on Tuesday.

"It's running a big risk playing on an unhealthy shoulder with Roland Garros [ Images ] round the corner and Wimbledon [ Images ] shortly afterwards.

"I'm pulling out of Nice for now, obviously the situation is not perfect for Roland Garros."

The 28-year-old's best result at the French Open is the fourth round in 2009 given he is not a clay court specialist but he has reached three Wimbledon finals. He won the 2003 U.S. Open.