DOHA, Qatar, Dec. 31 (UPI) -- Defending champion Ivan Ljubicic collected a straight-set win Monday in the opening round of the Qatar Open.
Ljubicic, seeded fourth, swept out Stefan Koubek 6-4, 6-4 at Doha's Khalifa Tennis Complex to open his play in the Australian Open tuneup event. Ljubicic improved to 14-2 at the Qatar Open. He defeated Andy Murray in last year's final after finishing second in 2004 and 2005.
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