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Retired boxing champ Floyd Mayweather returned to the ring on Sunday night, June 6, for an exhibition fight with YouTuber Logan Paul.

The two pugilists went toe-to-toe for eight rounds without a knockout at Hard Rock Stadium in Miami, Florida, and Floyd confessed that Logan surprised him with his skills.

"I was surprised by him tonight. He's a great young fighter - strong and tough. He's better than I thought he was."

However, fans who paid $50 to watch the bout were not impressed with either fighter. Many fans demanded their money back after it appeared that Floyd held Logan up to prevent him from slumping to the canvas in the sixth round.

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They hollered that the fight was fixed - and that the 44-year-old champ deliberately went easy on Logan to avoid knocking him out.

Prior to the Logan boxing match, Floyd expressed concern that fans would demand their money back if the Logan fight ended with an early knockout.

He had good reason to be worried.

The undefeated champion boxer retired as a professional fighter in 2017 with a pristine 50-0 record. But he grew bored with retired life, so he agreed to participate in exhibition fights if the money was right.

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On New Year's Ever 2018, he fought 20-year-old Japanese kick boxer Tenshin Nasukawa in Tokyo. The three-round exhibition ended with three first-round knockouts.

Tenshin was seen crying on camera -- and boxing fans howled over what they believed was a rigged fight.

Floyd is now considering another easy exhibition fight -- maybe against Paul's brother, Jake Paul, who loudly challenged the fighter to a match earlier this year.

Watch highlights from the fight below.