Michael Phelps With USA Hoops Stars After Golden Night

What did Michael Phelps get after winning his 21st gold medal? A visit from 5 extremely tall millionaires ... otherwise known as the TEAM USA MEN'S HOOPS SQUAD!

Kevin Durant, Klay Thompson, Draymond Green, DeAndre Jordan, DeMarcus Cousins and Kyle Lowry dropped in on Phelps and the USA swim team after the 4x200 freestyle relay.

It makes sense they'd chill ... the USA hoopers were GOING GRAZY in the stands after Phelps won his 20th gold ... showing some real deal American pride.

To be fair we're proud of everyone in the photo ... especially Draymond for keeping his clothes on.