MELBOURNE          -          Tennis greats Roger Federer and Rafa Nadal pledged A$250,000 ($172,000) towards the Australian bushfire relief efforts at a charity event on Wednesday in the leadup to the Australian Open. World number one Nadal made the announcement at Melbourne Park’s Rod Laver Arena during the “Rally for Relief” event where top players including Serena Williams and Australian Open defending champion Novak Djokovic led fundraising efforts. “Hopefully that will keep inspiring the people to support this terrible disaster that we’re going through and helps to recover all the things that we need,” Nadal said after an exhibition match. Australia is experiencing one of its worst bushfire seasons on record, with fires burning for months and killing 28 people.