Grand Slam winners Juan Martin Del Potro and Novak Djokovic warmed up for next week's Australian Open with comprehensive opening victories at the Kooyong Classic yesterday.
Del Potro, winner of the US Open title in September, got onto court for the first time since losing the November season-ending final in London to Nikolay Davydenko, emerging with a 6-3, 6-3 victory over Ivan Ljubicic.
2008 Australian Open champion Djokovic, world No3 behind Roger Federer and Rafael Nadal, needed less than an hour to defeat Tommy Haas 6-2, 6-3 after two losses to the 31-year-old German in 2009.
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