US Open blow for Serena

World number one Serena Williams has withdrawn from the 2010 US Open as she continues to recover from a cut to her right foot.

The three-times former champion cut her foot on a piece of broken glass in July, which required surgery, and she has not competed on the WTA Tour since winning her 13th career grand slam title at Wimbledon.

US Open tournament director Jim Curley said in a statement: "We regret that Serena Williams is unable to play the US Open and wish her a speedy recovery."

He added: "She will be missed, but the tournament is about the competition and the players on the court.

"This year's US Open will be a memorable event, as it has been every year."

The 28-year-old underwent an operation after suffering the injury and was ruled out of the hardcourt events in Istanbul, Cincinnati and Montreal.

She hoped to return for the final grand slam of the year, which begins on August 30 in New York, but her return has now been put on hold.

Williams was knocked out of the US Open in the semi-finals by eventual champion Kim Clijsters last year, losing her temper with a line judge against whom she launched a verbal tirade.

Williams was called for a foot fault, handing her opponent a match point.

She was later handed a three-year suspended ban from the tournament and fined £53,000.