Claressa Shields beats Dicaire to become first four-belt champion at two weights

• Shields unifies IBF, WBA, WBC and WBO titles at 154lbs
• Two-time Olympic champion also won four belts at 160lbs

Claressa Shields won a unanimous decision over Canada's Marie-Eve Dicaire in their junior middleweight title unification bout Friday night, becoming the first boxer in the four-belt era, male or female, to become an undisputed champion in two different weight classes.

The two-time Olympic gold medalist from the United States won 100-90 on all three cards in the headline attraction, which marked the first time in 20 years a women's boxing match was the main event of a pay-per-view.