Watch Celtics guard Isaiah Thomas show up Mayweather on the court

Isaiah Thomas and Floyd Mayweather are friends. They work out together. They give each other expensive gifts. And they beat each other in basketball. 

One of the niftiest players in the world, Thomas is clearly outside Mayweather's reach on the court, and he proves it in the video above.

Thomas probably wasn't going as hard as he can and still knifed through defenders on his way to the rim, getting wherever he wants at will.

As someone who averaged 19 points per game for the Celtics last season, it'd be a problem if Thomas didn't dominate the boxer.