Fish hands it to Federer
Top seed benefits from walkover in US Open last 16
Last Updated: 03/09/12 8:24pm
Roger Federer: world number one into last eight of US Open without hitting a ball
Roger Federer progressed to the quarter-finals of the US Open without hitting a ball on Monday as Mardy Fish pulled out of their scheduled fourth-round match for health reasons.
The American needed minor surgery earlier this year to correct an irregular heartbeat and admitted after his five-set second-round win over Nikolay Davydenko that doubts over his health remained.
Fish then had another long match against Gilles Simon in the third round, after which he did not do a press conference because of medical reasons.
The 30-year-old did not practise on Sunday and his withdrawal is believed to be because of worries over his heart.
Fish issued a short statement that said: "I regret that I have to withdraw from the US Open for precautionary measures. I was reluctant to do so, but am following medical advice.
"I had a good summer and look forward to resuming my tournament schedule in the fall."
The walkover means Federer extended his record of consecutive grand slam quarter-finals to 34, and in the last eight on Wednesday he will play sixth seed Tomas Berdych.
The Czech has looked in fine form this tournament and reached his first quarter-final at Flushing Meadows with a dominant 7-6 (7/4) 6-4 6-1 victory over 11th seed Nicolas Almagro.
The first set was tight but Berdych gradually wore down Almagro and in the third set the Spaniard cut a frustrated figure.
Berdych and Federer have met 15 times before, with the Swiss player winning 11 of them, but Berdych did win their quarter-final clash at Wimbledon in 2011 before going on to reach his only grand slam final.