Though he's not actively looking to return to mixed martial arts, Georges St-Pierre continues to train, and his coach believes he hasn't necessarily closed the door on the sport.

"I think the thing that's going to motivate him is a megafight," Firas Zahabi said Wednesday on the "Joe Rogan Experience MMA Show." "He doesn't want to be champion again and fight every three or four months. That's done. That's not going to happen no more.

"But one megafight. Invite him back for a megafight, see if you could entice him."

St-Pierre, the former UFC welterweight and middleweight champion, announced his retirement from MMA in February. At the time, he cited the fact that a fight with lightweight champion Khabib Nurmagomedov failed to come to fruition as a factor in his decision.

The Quebec native said in October that's a bout he would still come back for; it's perhaps an example of the megafight Zahabi is talking about.

"He's still ripped, shredded," Zahabi said of St-Pierre. "He could do five rounds - maybe not five rounds right away, but he needs a few weeks and then he's doing five rounds ... He could get in fight shape. He's there. He's just a monster. He's a very young 38-year-old. I would tell you he's 20 years old."

St-Pierre is considered one of the best fighters of all time. He returned to the sport in 2017 after a four-year hiatus, defeating then-middleweight champion Michael Bisping by submission to win a UFC title in a second weight class. St-Pierre holds notable wins over Matt Hughes, BJ Penn, and Nick Diaz.

"He can kill anybody. He can kill anybody, this man," said Zahabi. "He's the world's greatest martial artist."