NBA star Jayson Tatum is fresh off winning gold in Tokyo, but the Boston Celtics guard is hungry for more — telling TMZ Sports he’s gunning to add an NBA championship to his collection!!!

The 2-time All-Star and All-NBAer was out in Beverly Hills fresh off helping Team USA win it all at the 2020 Games … and we asked where his shiny, new medal lands on his growing list of accomplishments.

“It has to be at the top so far, but clearly gotta bring a championship to the Celtics,” 23-year-old Tatum tells us. “That’s first on the list.”

The Celtics have a new coach this season with Ime Udoka … but it’s clear Tatum thinks Boston will be able to make a better run in the playoffs after getting eliminated in the first round in 2021.

Tatum tells us he’s still riding the high of winning gold … calling it “the coolest thing I’ve done so far.”

As for whether he proudly wears the medal out and about, Jayson says it’s a bit too heavy for his liking … but he still did for a “little bit” after he got home.