From one welterweight great to another, Georges St-Pierre had high praise for current UFC champion Kamaru Usman.

Usman (19-1 MMA, 14-0 UFC) has looked unstoppable of late and is coming off a thunderous knockout of Jorge Masvidal at UFC 251. Unbeaten in the UFC, “The Nigerian Nightmare” has recently scored finishes of Colby Covington, Gilbert Burns and Masvidal, showing he’s much more than just a wrestler.

Although he’s yet to come close to St-Pierre in terms of title defenses, he’s well on his way to carving his own legacy. Former longtime UFC welterweight king and ex-middleweight champ St-Pierre thinks Usman currently is the No. 1 pound-for-pound fighter, despite the UFC having him at No. 2 behind Jon Jones.

“I think Usman, right now, is the best pound-for-pound,” St-Pierre said in an interview with Bleacher Report. “In terms of performance, I think he’s one of the best right now and he’s an active competitor.”

St-Pierre also lauded numerous other fighters, including newly crowned flyweight champ Brandon Moreno, who became the first Mexico-born UFC champion when he submitted Deiveson Figueiredo at UFC 263.

“I like to watch (Israel) Adesanya as well – Francis Ngannou, Ciryl Gane,” St-Pierre said. “I like (Alexander) Volkanovski – all of the champions.

“If we’re talking about who’s the greatest, I think Moreno is pretty amazing. The way he beat Figueiredo, that was amazing. It was an amazing performance – as good as it gets.”