(CNN) Justin Bieber isn't ready to get into the ring with Tom Cruise.

Bieber challenged Cruise to a fight this week on Twitter, but the pop star apparently is walking it back now. "It was just a random tweet. I do that stuff sometimes," he told TMZ on Wednesday. "I think he would probably whoop my a** in a fight. He's got that dad strength."

It all started when Bieber tweeted, "I wanna challenge Tom Cruise to a fight in the octagon. Tom if you don't take this fight your scared and you will never live it down. Who is willing to put on the fight?"

I wanna challenge Tom Cruise to fight in the octagon. Tom if you dont take this fight your scared and you will never live it down. Who is willing to put on the fight? @danawhite ? — Justin Bieber (@justinbieber) June 10, 2019

The internet had a field day with the Biebs' tweet; even former UFC champion Conor McGregor said he'd host the fight.

"If Tom Cruise is man enough to accept this challenge, McGregor Sports and Entertainment will host the bout. Does Cruise have the sprouts to fight, like he does in the movies? Stay tuned to find out!" McGregor tweeted.

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