Qatar Open

SYDNEY - Serbian tennis player Viktor Troicki is through to the semi-finals of the Sydney ATP tournament after German Philipp Kohlschreiber retired from their match on Thursday due to injury.

In a bid to reach another final, title defender Troicki will face Gilles Muller of Luxembourg.

AP photo/Rick Rycroft

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SHANGHAI - Serbia's Viktor Troicki has been knocked out of the Shanghai Masters tennis tournament after losing 6-3, 6-3 to Spaniard Roberto Bautista Agut in the third round on Thursday.

Bautista Agut won after just 75 minutes of play and is now 3-0 head-to-head against Troicki, who had defeated Rafael Nadal in the previous round.

SHANGHAI - Serbia's Viktor Troicki is through to the third round of the Shanghai Masters tennis tournament after beating Spaniard Rafael Nadal 6-3, 7-6 (7-3) on Wedneday.

Troicki, who had lost all five of his past encounters with Nadal, won after 94 minutes of play and will next face the winner of the tie between American Taylor Fritz and Spaniard Roberto Bautista-Agut.

DOHA - Serbia's Novak Djokovic started off with a victory at the ATP tournament in Doha on Tuesday, easily beating compatriot Dusan Lajovic 6-2 6-1.

World number one needed only an hour in his first official match against Lajovic, hinting that he was in great form ahead of the first Grand Slam of the season, the Australian Open.

DOHA - Serbian tennis players Novak Djokovic and Filip Krajinovic scored a successful start in the men's doubles competition at the Doha ATP as they defeated Tunisia's Malek Jaziri and Jabor Mohammed Ali Mutawa from Qatar, 2-0 (6-1, 6-4).