Novak Djokovic upset the New York crowd after setting up a US Open semi-final meeting with Roger Federer by beating Andy Roddick.
Djokovic will meet defending champion Federer in a repeat of last year's final after a 6-2 6-3 3-6 7-6 success against home favourite Roddick.
The Serbian third seed had struggled through his fourth round match against Tommy Robredo, hampered by a hip injury and a stomach upset.
That prompted Roddick to remark that he had been afflicted by "16 injuries" - a claim the world number three responded to after his quarter-final victory.
"That's not nice anyhow to say in front of this crowd that I have 16 injuries and I am faking it," Djokovic said in a courtside interview to a chorus of boos from the American crowd.
"I have nothing against anybody. Andy was saying that I have 16 injuries in the last match so obviously I don't, right?
"I am really happy playing against Roddick on his court and in his city in his favourite tournament so to win against him is a huge effort. Like it or not, it's like that."
Djokovic, the Australian Open champion, is now certain to have the crowd against him when he takes on Federer for a place in what would be his third Grand Slam final.

World Tour Finals - Day Two
Del Potro v Verdasco
Soderling relishes Nadal victory
Federer overjoyed with Verdasco win
World Tour Finals - Day One
Nadal v Soderling
Djokovic v Davydenko
Winning start for Murray at O2
We take a closer look at the ATP World Tour Finals and give our verdict on the likely finalists in London.
Novak Djokovic is convinced his hard work will pay off during his World Tour Finals defence.
While Pac Man may have won big in Vegas, others in the world of sport didn't fair so well at the weekend.