Roger Federer and Rafael Nadal teamed up with other top players in a special "Rally for Relief" charity match for Australian flood victims, a day before the start of the Australian Open.

Players cracked jokes and poked fun at each other, mixing entertainment with pledges of support at the event Sunday in front of a capacity crowd.

Third-seeded Kim Clijsters told the cheering crowd: "Hopefully, we can take some of the stress away."

Organizers aimed to raise more than $1 million for flood relief.

The floods have caused at least 27 deaths in Australia's northeast since late November, and 14 other people are missing, most of them from a flash flood that swept through towns west of Brisbane on Monday.