Defending Australian Open champion Stan Wawrinka of Switzerland warms up during a training session at Melbourne Park. Photos: EPA

I'm not a favourite for Australian Open, says defending titleholder Stan Wawrinka

World number four plays down his chances of repeating last year's Melbourne triumph as the first tennis grand slam of the year gets under way

Topic |   Australian Open 2015

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Defending Australian Open champion Stan Wawrinka of Switzerland warms up during a training session at Melbourne Park. Photos: EPA
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