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Puerto Rican Serrano, 34, landed almost twice as many blows but praised her 41-year-old friend after judges scored the bout 99-91, 100-90, 100-90.<\/span><\/p>\n<\/div>\n“Heather is a hell of a fighter. She’s as tough as they come,” she said of the her fellow Brooklyn-based boxer.<\/span><\/p>\nSerrano’s manager, YouTuber Jake Paul, beat former UFC fighter Nate Diaz.<\/span><\/p>\nSerrano has signed with the Professional Fighters League to compete in MMA, along with Paul, and refused to call out future opponents after her victory.<\/span><\/p>\nShe became undisputed featherweight boxing champion with a win over Erika Cruz in February that set up a potential rematch with Irish fighter Katie Taylor, who won their lightweight contest last year.<\/span><\/p>\nBut the Puerto Rican withdrew from the rematch with injury, and Britain’s Chantelle Cameron stepped in to inflict Taylor’s first professional defeat.<\/span><\/p>\n