The Hopman Cup is an invitational sanctioned by the International Tennis Federation. It does not give ranking points or add to a player's record.
Williams and Federer both played in the tournament, but never in the same year.
But they're not meeting on the court alone. Each will be playing with a partner in a mixed doubles match between Switzerland and the U.S., the BBC reported.
He will be paired up with Belinda Bencic and she will match up with Frances Tiafoe.
Before the doubles match, Williams will take on Bencic and Federer will go against Tiafoe in singles matches, the Times reported.
Credit: Paul Kane/Getty Images
Credit: Paul Kane/Getty Images
You can watch the match starting at 4:30 a.m. Tuesday on the Tennis Channel.
Start your 2019 with Serena and Roger.
— Tennis Channel (@TennisChannel) December 31, 2018
Here's what you should know about the dream @HopmanCup showdown.@SerenaWilliams/ @FTiafoe vs @RogerFederer/ @BelindaBencic
Live January 1st, 4:30am ET→ https://t.co/tPoe44C26q pic.twitter.com/x4yJQLuSgs
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