Serena Williams joined former heavyweight boxing champion Mike Tyson for a sparring session Wednesday as she prepares for the upcoming season.
The pair met up in Boca Raton, Fla., at the "Mouratoglou Preseason," an annual camp organized by Williams' coach Patrick Mouratoglou that brings together players and celebrities, according to Robin Bairner of WTA Tennis.
Tyson liked what he saw from Williams, captioning one Instagram photo, "I don't want to get in the ring with this GOAT."
