Serbian teenager Novak Djokovic started on an eight-match winning streak and with a reputation as one of the fastest risers in the tennis world.

He ended it as just another Federer victim.

Peerless world No.1 Roger Federer, the winner of two of the past three Australian Open men's singles titles, crushed the 19-year-old 14th seed 6-2 7-5 6-3 in their fourth round encounter.

Federer's uninterrupted flow of sweet passing shots and winners from both sides of the court, mixed with a few brilliant reflex volleys, would have been labelled incredible had they been produced by any other player.

But for the man who already has nine grand slam titles to his name at age 25, including three last year, it was just another night at the office.

His comfortable straight sets victory, which took less than two hours, means he has yet to drop a set in the tournament.

That record could well continue in his quarter-final clash with Spanish seventh seed Tommy Robredo, who booked his shot at the Swiss master by beating Frenchman Richard Gasquet 6-4 6-2 3-6 6-4.

Federer has won all six of his previous matches against Robredo, only once dropping a set to him.

He never looked troubled by Djokovic, despite the 19-year-old having come into the Open in superb form on the back of his third career title in Adelaide.

Djokovic notched the first two tournament victories of his budding career last year to rocket from No.83 in the rankings to No.16 at the start of 2007, becoming the youngest player in the top 20.

But Federer quickly showed the youngster how far he has yet to go, cruising through the opening set without a hiccup.

The second set was more competitive, with Djokovic able to stay on serve until the final game, but he eventually yielded to Federer's skill and control, giving up the set with a netted forehand.

The third was again light work for Federer, after he broke Djokovic's serve in the fourth game.

When Federer comfortably held his own serve in the next game to take a 4-1 lead, the Serb youngster sat courtside shaking his head in despair and disbelief during the change of ends.

From there the finish was a formality, with Federer icing the match with an ace to rack up his 33rd straight win on tour and his 11th straight victory at Melbourne Park.

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