The top American tennis player Mardy Fish has been forced to withdraw from the US Open because of his ongoing heart condition.
The 31-year-old former world top-10 player has decided not to risk his health by playing in what would have been his first grand slam event for 12 months.
Fish, who suffers from an accelerated heartbeat, has played only eight matches on the ATP Tour this year, most recently at the US Open warmup tournament earlier this week in North Carolina, from which he withdrew because of heat stroke.
