Claressa Shields retained her undisputed heavyweight title with a unanimous decision win over Lani Daniels in Detroit, Michigan.

The American, 30, was levels above New Zealander Daniels in a largely one-sided contest, held in front of a reported 15,000 fans at the Little Caesars Arena.

Daniels offered little attacking intent early on, staying on the back foot and largely evading Shields.

As the fight progressed, Shields asserted her dominance, landing cleanly in the middle rounds – particularly with body shots – snapping the 37-year-old’s head back in the seventh as her movement began to fade.

Daniels improved slightly in the later stages, with the pair trading punches in the eighth, but Shields, who refers to herself as the ‘Greatest Woman of All Time’, was a clear and deserved winner.

She improved her professional record to 17-0 with scores of 100-90, 99-91, and 99-91.

“I thought she wanted to fight, but she didn’t really engage until the last three rounds,” Shields told broadcaster DAZN.

“She was very tough and tricky toward the end, but I know I won every round.”