Wozniacki braves the cold with Wim Hof, the Iceman

Do you expect retirement to look like endless sunny days on the beach? Not for Caroline Wozniacki. The 29-year-old headed straight for the snow and ice in the Polish mountains instead, with none other than Wim Hof (also known as Ice Man).

Her husband David Lee is part of the expedition, which involve a lot more than sitting around drinking cocktails.

Her brother, mother and father are also on the unique family trip.

Novak Djokovic recently did his own version of a freezing test he called the Nole Challenge, though it was far more tame than Wozniacki's adventure. He tagged Hof in a post of himself sitting in a freezing river for over a minute.

Djokovic was one of the many players to comment on Wozniacki's incredible photo with Hof, including Serena Williams and Stefanos Tsitsipas.

Wozniacki retired after the Australian Open, playing her last match against Ons Jabeur.