Stars including Roger Federer, Nick Kyrgios, Rafael Nadal, Serena Williams, Novak Djokovic, Naomi Osaka, Caroline Wozniacki, Stefanos Tsitsipas and Alexander Zverev also played Fast Four doubles at the event that helped to raise nearly $4.8 million.
Belinda claimed titles in Dubai and Moscow previous year, reaching the semi-final at Indian Wells and Madrid and suffering a loss in Mallorca final on grass before reaching the semi-final at the US Open. "We're all here tonight to support and help out", she added.
"And to have some fun, have a hit with Nick. we get along very well". Some of the big names also donated merchandise for an online auction Wednesday.
Team Caroline Wozniacki: Coco Gauff, Alexander Zverev, Stefanos Tsitsipas, Naomi Osaka. Team Williams were also the overall winners.
But the evening's star turn saw Federer play a set against Australian bad boy Kyrgios, who has been driving force behind the fundraising effort. "It was emotional", said Kyrgios, who made the first pledge to the appeal. "We're doing everything we possibly can to overcome this together".
"This unprecedented bushfire crisis is devastating people, land, communities, livestock and animals across the country and our hearts go out to everyone concerned", said Craig Tiley, General Manager of Tennis Australia and Director of the Australian Open tournament.
Australian Open's qualifiers were disrupted for the second successive day because of the thick grey hazy in the morning due to the smoke of the bushfire.
A cool change bringing rain swept through on Wednesday afternoon, raising expectations of clearer air for Thursday.
Tennis chiefs have insisted any delays to the Grand Slam's scheduled start on Monday were unlikely given Melbourne Park has three roofed stadiums and eight other indoor courts which could be used in an emergency. AO Rally for Relief promises an incredible night of tennis and entertainment, as well as a wonderful opportunity to get the most out of our sport for this important cause.