NEW YORK: Novak Djokovic better have his heavy armour on when he steps out to stop four-times champion Roger Federer from reaching his fifth successive final at the US Open on Saturday.

The Serbian is likely to be greeted by 23,000 hostile fans on Arthur Ashe Stadium after his astonishing outburst against American Andy Roddick following their fourth-round tussle. Irked by Roddick’s suggestion that he was a hypochondriac, Djokovic told the booing crowd on Thursday:

“Andy was saying that I have 16 injuries in the last match so obviously I don’t,right? That’s not nice any how to say in front of this crowd that I have 16 injuries and I am faking it,” he added.

Less than an hour later, and realising that he had over reacted, Djokovic tried to do some damage limitation.

“He made a joke and it was a misunderstanding, so I don’t blame it on him. If I exaggerated on the court today and I made maybe a mistake (by) saying that in front of 20,000 people, I apologise. This was just impulsive. So I just hope people understand,” he explained.

Whether the fans will accept his apology remains to be seen but with Federer being a firm crowd favourite, the Serb is unlikely to be Mr Popular on Saturday. In the other semi, Rafael Nadal, who deposed Federer as world number one last month, will take on Briton Andy Murray.

In a year when Federer’s aura of invincibility has been pricked, punctured and ripped apart, the US Open remains his final chance to rescue what has been a dreadful season by his own high standards.

The winner of 12 grand slam titles at the start of 2008, here linquished his Australian Open crown to Djokovic.

He then received a mauling by Nadal in the French Open final but the most painful defeat was undoubtedly at the All England Club. Going for a record-equalling sixth successive men’s title, he ended up playing the supporting act to his bogey man Nadal in what is considered by many as the greatest tennis match ever.

While New York fans are desperate to see another final showdown between the Swiss master and Major can muscle man,Djokovic hopes he can turn out to be the joker in the pack.

The 21-year-old snapped Federer’s record streak of reaching 10 successive major finals in January at Melbourne Park, and inspite his trials and tribulations on court and his losing 6-2 record against the Swiss, he feels he could repeat the feat.

Murray will probably discover that what looks simple on paper may be more difficult when he faces Nadal across the net. In a season when Nadal finally spread his ten tacles outside Roland Garros, by grabbing his first Wimbledon title and an Olympic gold, the US Open title is now his next target.

Seeded number one at a slam for the first time, he would like nothing better than fulfilling his billing and Murray will have to play the match of his life if he is to hand the Spaniard only his third defeat in his last 57 matches.

“My goal is find my best feeling and my best performance(then I will have) all the chance for winning,” he said.