Jayson Tatum has a reminder for Kyrie Irving — and everyone, really.

The Boston Celtics on Friday held a practice ahead of Saturday’s tilt against the Los Angeles Lakers at Staples Center. During the practice, they ran a drill where one player received a pass at the elbow and had to back down a defender to score.

Irving at one point was tasked with guarding Tatum. After receiving the pass, Tatum burned Irving and finished at the rim, which clearly fired up the second-year wing.

That’s when Tatum reminded folks he no longer is 20 years old.

Message received.

Thumbnail photo via Nelson Chenault/USA TODAY Sports