TENNIS is the CBD game!

As part of his deal with the company, the No. 14-ranked Isner will be wearing Defy's logo on his hat during matches and he'll also be drinking the CBD-infused beverage, which is promoted as a muscle recovery aid.

“I play a sport where taking a single point off can be the difference between winning and losing a match and Defy is a product specifically intended to put me in a position to perform on every single point,” Isner, the top-ranked American tennis player, said in a statement Tuesday.