Thiago Santos fought Jon Jones on one leg for the light heavyweight title.

Santos’ manager Alex Davis told ESPN that Santos tore the ACL, MCL, PCL and meniscus in his left knee Saturday during the UFC 239 main event in Las Vegas. On top of that, Santos partially tore a ligament in his right knee. He is out for the rest of 2019, and could be out longer than that.

“I left everything in there even after injuring my knee in the first round,” Santos said through an interpreter after the fight. “I fought four rounds on a southpaw stance, unable to move like I usually move, unable to throw the strikes I usually throw. I didn’t shock the world because of those circumstances, but I did what I could do in those conditions and I’m satisfied.”

Despite the injuries, Santos nearly pulled off a monumental victory for the 205-pound championship, with two judges scoring the fourth round for Santos and one judge giving him the fifth.

Jones won the fight by a split decision, marking the first time he reached decision without winning unanimously, ending Santos’ four-fight winning streak.

Afterward, Jones said he wasn’t aware of Santos’ leg injuries during the fight.

“Boy, he was tough,” Jones said following his win. “We all knew Thiago’s best chance was to knock me out. I played it smart and brought home this gold for my family and team. He was technically a lot more sound than I thought. Thiago Santos is a blackbelt in Muay Thai. I’m proud of myself, because I stood with a guy who’s been kickboxing way longer than me.”