Warning: Story contains coarse language

Sean O'Malley won't give credit to Marlon Vera for beating him at UFC 252.

The rising bantamweight star suffered his first career loss last weekend in Las Vegas, but he doesn't believe it was a legitimate win for his opponent. O'Malley sustained a leg injury early in the fight and struggled to stay upright before "Chito" finished him late in the first round.

"It sucks for me, because I'm like, 'God, I lost to someone who I look at as not very good,'" O'Malley said on his "The Timbo Sugar Show" podcast. "I look at (Vera) and I'm like, 'He's not that good,' and I f------ lost to him. That's what's the most frustrating thing probably, just losing to somebody I'm better than."

O'Malley reportedly didn't suffer any fractures in his ankle or lower leg but will undergo an MRI this week to look for ligament and tendon tears. The 25-year-old said he "lost in a way that I didn't feel like I lost."

"It's not always the better guy wins," he said. "It's whatever the f--- happens. But I was like, 'God, I did everything right.' I can't look back on that and be like, 'Well, I could've done that better.' I did everything right. There was nothing I did wrong - the sparring, the training, the f------ eating, the sleeping. Everything I did was f------ right."

"Sugar" said he was confident in the early moments of the fight.

"In my mind, I'm like, 'This is easy. He's slow. He can't hit me,'" O'Malley said.

The prospect added he started feeling pain in his ankle after the injury occurred, but he didn't think he was out of the fight.

"I'm like, 'I'm not very mobile, but I don't feel in danger, I don't feel like he's a threat,'" he said.

O'Malley said he took issue with Vera's postfight celebration.

"He gets lucky and beats me and jumps up like he just f------ won the lottery," he said. "That just showed me what kind of a b---- he was."

O'Malley is disappointed and frustrated after his first loss, but the Montana native is looking forward to seeing how his career progresses compared to Vera's.

"What makes me feel better, OK, let's look at his career in five years, (and) let's look at mine," O'Malley said. "I'm gonna be f------ world champion, and he's gonna be a f------ journeyman. That's just what his style is - he wins some, he loses some."