Another instant classic from Katie Taylor and Amanda Serrano was marred by headbutts, a nasty cut and a controversial decsion.

Amanda Serrano said Katie Taylor "100 percent" intentionally headbutted her during Friday night's undisputed women's super lightweight title bout.

Katie Taylor retained her undisputed women's lightweight championship with a controversial and unpopular unanimous decision over Amanda Serrano on Friday night at AT&T Stadium. The fight was a return bout of their magnificent 2022 encounter at Madison Square Garden that Taylor won by a narrow split decision.