Justin Bieber and Floyd Mayweather are getting rough. The two had another man date -- except this time, they're not getting pedicures and massages.

Justing posted three shots of him training with the welterweight champ early Friday morning (October 17).

Justin and Floyd's friendship goes back to earlier this year. Biebs and Lil Wayne accompanied the boxer to the ring in May for his fight with Marcos Maidana -- the same event he brought Kylie Jenner to. He escorted his friend to the ring again before his match with Saul “Canelo” Alvarez in September. And, as it turns out, Floyd's daughter Iyana is a fan.

So is Justin training to go in the ring himself? We'll just have to see...