Tennis greats Roger Federer and Serena Williams will meet on court for the first time at the Hopman Cup on Tuesday when Switzerland face the USA in Perth.
They will play in men's and women's singles rubbers before meeting in the mixed doubles alongside partners Belinda Bencic and Frances Tiafoe.
Federer and Williams, both 37, have won a combined 43 Grand Slam titles.
"It is very exciting for both of us and I hope a lot of tennis fans tune in and watch it," said Federer.
Williams said it was "like a dream come true".