Katie Taylor and Amanda Serrano have developed the greatest rivalry in the history of women's boxing with two fantastic fights. The women are set to face off one more time, headlining a card from New York's Madison Square Garden this Friday night with Taylor's four junior welterweight championships on the line.

Here is more on NBA player Isaiah Hartenstein's wife Kourtney Kellar, who will be a ring girl for the Katie Taylor vs. Amanda Serrano fight.