The Mission Impossible star did not comment on the posts, but it appeared that many on social media believe Cruise would dispatch the Baby singer with ease.
Odds Shark, a source for online handicapping, said, “We don’t like your odds, Justin.”
Bobby Nash, an MMA fighter called out the singer, “You’re calling out a 56 year old man lol.”
Cruise stands at 5ft 7in and weighs 77 kilograms. He is famous for doing most of his own stunts and maintaining an enviable physique. He appears ready and willing to fight on screen and often does so while falling from a plane.
Bieber reportedly has two inches on Cruise but weighs just 66kg, according to reports.
“I would love to see this exhibition,” Diego Sanchez, an MMA fighter posted.
This article originally appeared on Fox News and is republished here with permission.