Roger Federer, Serena Williams and Rafael Nadal will take part in an exhibition match to raise money for a bushfire relief fund in Australia.
The match is scheduled for January 15, five days before the start of the Australian Open, and will take place at Melbourne's Rod Laver Arena.
Australian Nick Kyrgios will also be playing, along with Stefanos Tsitsipas, Naomi Osaka and Caroline Wozniacki.
All funds raised from the two-and-a-half-hour event, called AO Rally for Relief, will be donated to the relief cause with tickets priced at A$54 (AED 136).
Hundreds of fires have scorched more than 25 million acres of land, killing at least 25 people and an estimated 500 million animals in recent months.