Many world class players, including Serena Williams, Naomi Osaka, Caroline Wozniacki, Roger Federer, Novak Djokovic and Rafael Nadal, played a benefit game in Melbourne on Wednesday to raise money for the forest fires victims in Australia. Nadal and Federer announced that they would donate around 225,000 euros together.

For a change, the world toppers dealt informally with each other on the track. (Photo: Getty Images)

Several doubles were played in the Rod Laver Arena. Petra Kvitová and Rafael Nadal give each other a high five. (Photo: Getty Images)

Naomi Osaka and Stéfanos Tsitsipás made a doll. (Photo: Getty Images)

Stéfanos Tsitsipás made himself useful as a ball boy. (Photo: Getty Images)

Rafael Nadal and Novak Djokovic also formed a couple in the doubles. (Photo: Getty Images)

The Rod Laver Arena was packed for the benefit competition. (Photo: Getty Images)