Kobe Bryant's just been made an ambassador for the new 2019 hoops World Cup ... and he's got a message for his home country heading into the big tourney.
"DON'T F*** THIS UP!"
No pressure ...
The FIBA World Cup is a brand-new, 32-team tournament set to go down next August and September in China ... and Kobe's new role is to help promote the event globally.
Bryant kicked that off with a video Tuesday ... callin' out Brazil, Spain, Australia, France and China to show him what they got.
But the Lakers legend made sure to let the Stars and Stripes know they better win the damn thing.