Novak Djokovic believes he'll halt Roger Federer

The third seed won 6-1, 7-6 (7/5), 6-1 in two hours and 32 minutes and will now play defending champion Federer, who proved too strong for Swiss compatriot Stanislas Wawrinka.

"I am taking one match at a time but if I continue playing like this I have a good chance," said Djokovic of his last-four meeting with the record 16-times grand slam champion.

"I have nothing to lose playing Federer, he is defending the title and I have to believe in myself to win that match."

Djokovic could have been in for a long night when he found himself 4-1 down in the second set after taking the first with ease, but he battled back to take it to a tie-break which he then claimed to end Berdych's resistance. "I played really well in the first and third sets and I was on and off in the second. I was a bit defensive and gave him some opportunities to get back into the match," he added.

"The turning point was the tie-break and if it went to one-set all it is a completely different match.

"It was a huge confidence boost to win that set and it meant I could go for my shots."

Federer made even smoother progress earlier yesterday.

The manner of Wawrinka's wins over Gael Monfils and Andy Roddick in his two previous matches offered hope he could test the world No 2, but the 19th seed was simply blown away as Federer cruised through 6-1, 6-3, 6-3.

Federer was quickly out of the blocks and raced through the opening set, breaking Wawrinka in the second game and then again for a 5-1 lead.

The match could have turned in game six of the second when Wawrinka claimed his first break point of the match. He was then presented with a makeable backhand pass up the line only to hammer it wastefully wide.

It signalled the beginning of the end for Wawrinka. His head dropped and, as the frustration started to mount, Federer capitalised, breaking in the next game with a backhand winner.

Federer threatened again when he brought up a set point at 5-3 on the Wawrinka serve. He missed it with an uncharacteristically sloppy drop-shot but second time round he made no mistake with a cross-court winner.

Down two sets and with Federer's first-serve percentage getting up to the 80 per cent mark, there was never going to be a way back for Wawrinka and he sensed it, smashing his racket into the court after dropping his serve once more at the start of the third as Federer broke with a winner down the line. The world No 2 did not let up and cruised through in one hour and 47 minutes.

"I think it was a good match for me really.I started off well, was able to serve and return really well," said Federer after extending his winning streak to 15 matches and reaching his eighth consecutive Melbourne semi-final.

"I expected him to serve bigger, because the ball travels faster through the air (during the day].

"For some reason I was able to return him well. On my own service games I was really good, too.

"I think that really set the tone for a good match for me."

Wawrinka said: "Sure I am disappointed to lose but I think he just played too well.

"He always had the answer."