Updated at 5:50 am on 17 January 2010
Roger Federer and other top tennis players will play exhibition matches at Melbourne Park this afternoon to raise money for victims of the Haiti earthquake.
The Swiss world number one says they'll be playing doubles or mixed doubles with the top women to try to fill the stadium.
Organisers says the "Hit for Haiti" charity event will include Serbia's Novak Djokovic, Americans Andy Roddick and Serena Williams and Kim Clijsters of Belgium.
The Australian Open starts tomorrow.
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