Floyd Mayweather Jr. vs. Miguel Cotto

Floyd Mayweather Jr. blows a kiss to the crowd as he celebrates his unanimous-decision victory over Miguel Cotto in their WBA super-welterweight championship fight on Saturday night at the MGM Grand Garden Arena in Las Vegas. (Al Bello / Getty Images)

March 24, 2014 9:55 PM PT

The unbeaten American improved to 43-0 with a unanimous decision over his Puerto Rican rival.

Floyd Mayweather Jr. is hoisted onto shoulders in the ring after winning the WBA super-welterweight belt with a unanimous decision over Miguel Cotto on Saturday night in Las Vegas. (Al Bello / Getty Images)

Miguel Cotto works over Floyd Mayweather Jr. in the corner during their bout Saturday night in Las Vegas. (Al Bello /’ Getty Images)

Floyd Mayweather counters with a left to the face of Miguel Cott during their fight on Saturday night at the MGM Grand Garden Arena. (Al Bello / Getty Images)

Blood streams from the nose of Floyd Mayweather Jr. as Miguel Cotto presses the attack in a corner on Saturday night. (Isaac Brekken / Associated Press)

Floyd Mayweather Jr. lands a right uppercut to the head of Miguel Cotto during their title fight on Saturday night in Las Vegas. (Al Bello / Getty Images)

Floyd Mayweather Jr. tries to duck a punch from Miguel Cotto during their bout Saturday night in Las Vegas. (Al Bello / Getty Images)

Floyd Mayweather Jr. lands a blow around the raised hands of Miguel Cotto during their title bout on Saturday night at the MGM Grand Garden Arena. (Eric Jamison / Associated Press)

Miguel Cotto, left, and Floyd Mayweather Jr. trade punches during their bout Saturday night in Las Vegas. (Isaac Brekken / Associated Press)

Miguel Cotto puts Floyd Mayweather Jr. on the defensive as they exchange punches on Saturday night during their championship bout in Las Vegas. (Al Bello / Getty Images)