It's the Battle of the Sexes between Nick Kyrgios and Aryna Sabalenka with special rules for the match.
The women's world no.1 takes on the Wimbledon finalist in a contest with some unusual stipulations.
Will Kyrgios or Sabalenka win the exhibition match in Dubai on December 28?
AllSportsPeople has all the details about the contest.
MORE: Battle of the Sexes: History of men vs. Women tennis matches ahead of Kyrgios-Sabalenka clash
Battle of the Sexes rules - Nick Kyrgios vs. Aryna Sabalenka
Match length
Best of three sets - with a match tiebreak to 10 points deciding the winner if required.
Serving
Both players will get one serve each, meaning they will need to prioritise accuracy over speed.
It was initially proposed that Sabalenka would get two serves to Kyrgios' one but that was decided to be too much of an advantage.\
Court size
Sabalenka's side of the court will be nine per cent smaller.
This is designed to reflect the movement and speed differences between men and women.
When is the 'Battle of the Sexes' between Nick Kyrgios and Aryna Sabalenka?
Kyrgios and Sabalenka will compete in the 'Battle of the Sexes' exhibition tennis match on December 28.
The contest will be held at the 17,000 capacity Coca Cola Arena in Dubai, United Arab Emirates.
What Kyrgios said about the match
“When the world number one challenges you, you answer the call,” 30-year-old Kyrgios said.
“I’ve got massive respect for Aryna, she’s a powerhouse and a true champion, but I've never backed down from a challenge and I'm not just here to play, I’m here to entertain—Dubai, get ready for a show.”
What Sabalenka said about the match
“I have so much respect for Billie Jean King and what she has done for the women’s game,” Sabalenka said on announcement of the season-ending match.
“I’m proud to represent women’s tennis and to be part of this modern take of the iconic Battle of the Sexes match.”