Markelle Fultz -- the projected #1 pick in the NBA Draft -- says he's all suited and booted for the big day ... telling TMZ Sports, "I'm blessed."
The 19-year-old former Washington Huskies superstar touched down in D.C. on Tuesday after his private workout with the Boston Celtics.
We asked how it went -- "Good, man."
As for the upcoming draft, Fultz told us, "I'm gonna have a great time. I'm blessed. I'm just happy to be there."
We also asked if there's a chance he'll rock Lonzo Ball's super expensive ZO2 shoes this season ... and shockingly, he didn't rule it out.