Behind a relentless early offensive assault led by an active jab, Mikaela Mayer held off a late charge by rival Sandy Ryan to win a unanimous decision and retain the women's WBO welterweight title Saturday night,

Mikaela Mayer and Sandy Ryan square off again for the WBO welterweight title. Here's the fight prediction, odds and how to watch.

Americas Mikaela Mayer won rematch with Sandy Ryan in Las Vegas by unanimous decision to defend WBO welterweight title; Ryan had been doused with paint before first Mayer fight and had Americans former trainer in her corner;