Photos: Deontay Wilder Drops, Beats Down Chris Arreola

Deontay Wilder retained his WBC heavyweight boxing title with a technical knockout when Chris Arreola's corner stopped the fight after the eighth round. Photos by Premier Boxing Champions.

An injured Wilder (37-0, 36 knockouts) knocked Arreola down in the fourth and peppered him with left jabs and hooks after landing hard rights early.

Arreola's left eye was swollen shut when his camp decided to stop the bout, but the fight wasn't all smooth sailing for the champion Wilder.

Promoter Lou DiBella said Wilder was taken to hospital after a doctor confirmed he had a broken right hand and a probable tear in that elbow.

Wilder showed reporters his injured bicep as he headed to the locker room and said he was already certain the hand was broken.

He threw the right, his biggest weapon, sparingly after the fourth round.

It was Wilder's fourth title defence and third in Birmingham, about an hour from his hometown of Tuscaloosa.

Arreola (36-5-1) took the fight on short notice after Wilder's mandatory defence against Alexander Povetkin was called off in May after the Russian failed a drug test.

"Man, it let's me know I'm a force to be reckoned with. If I have one hand or two hands, you can't deny that I'm the best in the world. I'm going to still give it to you whether I have one hand or two hands. I won't stop. As a champion it's my duty to keep going no matter what I'm going through. Painain't nothing to me. I got a high tolerance on pain. When you're dealing with fights, it's not over until it's over," Wilder said.

"Whoever fights me they have to be ready. They just can't come in and think they're going to bully me or think they're going to out-tough me or think they're going to out-punch me, because there ain't no out-bullying, there ain't no out-toughing, there ain't no out-punching, because I'm the heavyweight champion of the world. That means a lot to me."