The Mavericks might be down 0-2 to the Celtics in the NBA Finals, but Kyrie Irving hasn't lost an ounce of confidence in his team ... addressing Boston fans and guaranteeing they'll see him again in Game 5 of the championship series after Sunday's loss.
Uncle Drew's beef with Cs fans has been going on ever since his departure from Beantown in 2019 ... and another chapter was added to the rivalry as he made his way to the locker room following Dallas' 105-98 Game 2 loss at the TD Garden.