Original: On 16 January, the day before the 2011 Australian Open commenced, a number of players took part in the Rally for Relief which was held at Rod Laver Arena and attended by 15,000 people, which raised A$ 750,000.
Simplified: On 16 January, the day before the 2011 Australian Open, a number of players took part in the Rally for Relief. This was held at Rod Laver Arena in Melbourne, and 15,000 people went to see it and raised A$ 750,000.