The sixth seed won 6-3, 6-3, 6-3 in two hours 10 minutes to set up a meeting with either two-time defending champion Rafael Nadal or 1998 winner Carlos Moya, who play their all-Spanish quarterfinal later Wednesday.

The 20-year-old, the youngest player left in the men's draw, will be the third Serb to feature in the last four with compatriots Jelena Jankovic and Ana Ivanovic already in the semifinals of the women's singles.

He is also only the second Serbian man to reach a Grand Slam semifinal after Slobodan Zivojinovic who made the last four at the 1985 Australian Open and Wimbledon in 1986.

"I played really, really well. I wanted to impose my style of play. It's a sport where things can change very quickly," explained Djokovic, who also beat the Russian in their only previous meeting on clay at Estoril this year.

"I knew he could be very dangerous. He's a specialist on clay and beat (Andy) Roddick. It was his first quarterfinal and he had nothing to lose."

Andreev has dropped to 125th in the world after missing six months last season following knee surgery.

But despite defeating number three seed Roddick in the first round he failed to settle into his first Grand Slam quarterfinal.

He converted just one of his six break points with Djokovic converting five of his ten.

Djokovic got off to a tentative start by losing his opening service game as both players fought to hold serve in the first set.

But the Serb hit back immediately with a break and got the upper hand with a second in the eighth game as 23-year-old Andreev hit long allowing Djokovic wrap it up 6-3 in 44 minutes.

The Russian was broken in the first game of the second set as Djokovic opened up a comfortable 4-2 advantage, taking the set in 41 minutes with a further break in the ninth game.

Djokovic saved a break point in the opening game of the third set, fooling his opponent with a cross-court backhand which had the Russian scurrying in the wrong direction.

The Serb athletically fought every point and despite going 3-0 up drew whistles from the crowd as he vehemently argued a line call on his serve.

Hopes of a fightback were shortlived when Djokovic netted when serving for 4-1 but minutes later converted when Andreev hit wide. The Serb became more aggressive sealing the tie with ease on his first match point.

But Djokovic, who has retired from Roland Garros both previous times he played here, faces a tough task if he wants to become the first Serb to reach a Grand Slam final.

He stands 1-3 against potential semifinal opponent Nadal having lost their two meetings on clay including the quarterfinals here last year when he retired with a back injury when trailing the champion 6-4, 6-4.

The Serb stands 1-1 against Moya. Both ties were on clay with the Spaniard winning their most recent meeting in the Hamburg quarterfinals this year.