As bushfires continue to rage in Australia, the International Tennis Federation (ITF) and three grand slams have pledged a combined $400,000 (579,542 Australian dollars) to the relief effort.

The fires have ravaged large swathes of land, killing at least 28 people and millions of animals in the country where the first slam of the year begins next week.

Various fundraising initiatives have been launched and now the ITF has joined with Wimbledon, the US Open and the French Open to boost the cash total.

"The worldwide tennis community has come together in support of all those affected by the bushfires across many parts of Australia," said ITF president David Haggerty.

"This donation will support the Red Cross teams who are working hard on the ground providing essential emergency assistance including relief centres, aid and practical support for victims, evacuated families and those who have lost their homes.

"We would like to commend all members of the tennis community who are currently raising funds and awareness."

Among the other activities taking place is the AO Rally for Relief at Rod Laver Arena on Wednesday January 15, which will see Rafael Nadal, Serena Williams and Roger Federer take part.