Ireland's Katie Taylor, left, and Puerto Rico's Amanda Serrano pose after a super lightweight championship boxing match in New York.

Puerto Rico's Amanda Serrano is comforted by her team after losing to Ireland's Katie Taylor after a super lightweight championship boxing match in New York.

Ireland's Katie Taylor, left, punches Puerto Rico's Amanda Serrano during the ninth round of a super lightweight championship boxing match in New York.

Ireland's Katie Taylor, left, punches Puerto Rico's Amanda Serrano during the 10th round of a super lightweight championship boxing match in New York.

Ireland's Katie Taylor, right, punches works against during the eighth round of a super lightweight championship boxing match in New York.

Ireland's Katie Taylor, left, punches Puerto Rico's Amanda Serrano during the first round of a super lightweight championship boxing match in New York.

Puerto Rico's Amanda Serrano, right, punches Ireland's Katie Taylor during the second round of a super lightweight championship boxing match in New York.

Fans watch Puerto Rico's Amanda Serrano fight Ireland's Katie Taylor during the first round of a super lightweight championship boxing match in New York.

Ireland's Katie Taylor, left, punches Puerto Rico's Amanda Serrano during the first round of a super lightweight championship boxing match in New York.