Shields makes history with unanimous decision win over Dicaire

American boxer Claressa Shields becomes the first undisputed world champion in two different divisions in the four-belt era.

Claressa Shields (left) and Marie-Eve Dicaire raise their gloves after a boxing bout for the women's super welterweight title on Friday, in Flint, Michigan. Shields won by decision.

American boxer Claressa Shields scored a unanimous points victory over Canada's Marie-Eve Dicaire on Friday to become the first undisputed world champion in two different divisions in the four-belt era.

Shields, 25, retained her WBC and WBO light-middleweight titles, won the vacant WBA belt and also took Dicaire's IBF crown after all three judges at the Dort Federal Event Centre in Flint, Michigan, scored the fight 100-90 in the American's favour.

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"I was trying for the knockout," said Shields, who landed 116 punches to Dicaire's 31. "That's what I wanted. And I almost had it…at the end of the day, I'm the new undisputed champion at 154 pounds – the first boxer to do it in history."

Shields, a two-time Olympic champion, had previously unified all four major belts - WBC, WBA, IBF and WBO - at middleweight. After the fight, she was quick to call out Britain's Savannah Marshall, the only fighter to have defeated Shields as an amateur.

"You won a lucky decision when we were kids," Shields said.