Diamond, who performed at the Funny Bone Comedy Club Thursday through Sunday, told a Tampa, Fla., radio station that a woman broke into his room in a west Omaha hotel early Monday morning.
Diamond said the woman grabbed some video games, and he held her against the hotel room door until police arrived.
The 28-year-old woman denied attacking Diamond and told police he had assaulted her.
Omaha Police Sgt. Teresa Negron said no charges have been filed.
"It's a case of `he said, she said,"' Negron said.
Diamond, 29, is touring the United States with an 18-and-older standup comedy show.
In June, Diamond said he was selling T-shirts with his photo on them to try to raise money to save his Milwaukee home, which was under a foreclosure order.