Floyd Mayweather Jr. lands a right hand against Conor McGregor during their boxing match in Las Vegas on Saturday, August 26. Mayweather stopped McGregor in the 10th round, collecting his 50th victory in what he said will be the last fight of his undefeated pro career. It was the first pro boxing match for McGregor, a mixed martial artist who is the UFC's lightweight champion. Stephen McCarthy/Sportsfile/Sportsfile via Getty Images

McGregor lands an uppercut early in the bout. He came out aggressive and took the fight to Mayweather in the first few rounds. Isaac Brekken/AP

McGregor sticks his tongue out at Mayweather during an early exchange. Isaac Brekken/AP

McGregor swarms Mayweather at the start of the fight. Isaac Brekken/AP

The much-anticipated fight was held at the T-Mobile Arena in Las Vegas. Christian Petersen/Getty Images North America/Getty Images

After a typically slow start, Mayweather started to force the action more in the middle rounds. Christian Petersen/Getty Images North America/Getty Images

McGregor might have lacked in experience, but he had a clear size advantage. Christian Petersen/Getty Images North America/Getty Images

There were several awkward exchanges when McGregor would end up behind Mayweather. Christian Petersen/Getty Images

The two fighters trade punches in the middle of the fight. Ethan Miller/Getty Images North America/Getty Images

Mayweather landed more punches than McGregor -- 130-60 -- in rounds six through 10. McGregor had a 51-40 edge in the first five rounds. Christian Petersen/Getty Images North America/Getty Images

McGregor started running out of steam later in the fight, and Mayweather capitalized in the 10th round. Isaac Brekken/AP

Referee Robert Byrd stopped the fight in the 10th after a wobbly McGregor took several hard shots and wasn't throwing punches. Christian Petersen/Getty Images North America/Getty Images

Mayweather and his father celebrate the victory. Josh Hedges/Zuffa LLC via Getty Image

The two combatants embrace after the fight. Eric Jamison/AP

Demi Lovato sang the national anthem before the fight. Eric Jamison/AP

McGregor entered the arena first, draped in the Irish flag. Eric Jamison/AP

Mayweather came out in all black and wore a mask. Josh Hedges/Zuffa LLC via Getty Images

There were many celebrities on hand to watch the fight, including basketball star LeBron James. Behind James is boxing legend Mike Tyson. Isaac Brekken/AP

Actress Jennifer Lopez and her boyfriend, former baseball star Alex Rodriguez, take in the fight. Christian Petersen/Getty Images

Actress Charlize Theron sits close to ringside. Christian Petersen/Getty Images North America/Getty Images