1980s sci-fi b-movie?

Arena (1989)

starring Stars:Paul Satterfield, Hamilton Camp and Claudia Christian

IMDb synopsis:

Far in the future, on a distant space station, the legendary Arena is where the best fighters from every planet come to vie for the championship. For more than half a century, no Earthling has been good enough to be a contender~until, out of nowhere, comes an underdog, the great human hope: Steve Armstrong. He's been training all his life for a shot at the big time. Now, he's up against some mighty big muscle: a ruthless extraterrestrial crimelord who'll pull no punches to make sure he stops Steve dead.