Grant Williams

Jayson Tatum throws shade at Grant Williams over Mavs intro photo

Some things never change...

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Grant Williams' team has changed, but his relationship with Jayson Tatum hasn't.

Williams officially was introduced as a member of the Dallas Mavericks on Wednesday after the Mavs and Boston Celtics finalized a sign-and-trade for the veteran forward. Dallas welcomed Williams on social media by posting a photo of the 24-year-old superimposed in a Mavs uniform -- and looking impressively fit.

Enter Tatum, who chimed in on Instagram to roast his former Celtics teammate in the comment section.

"Lol mf you ain't this strong," Tatum wrote, to which Williams fired back sarcastically, "you'll get like me one day. I believe in you."

This type of banter was par for the course for Tatum and Williams during their four seasons as Celtics teammates. The two are actually very close friends, often choosing to express their affection by mercilessly ribbing each other.

Here's a quick highlight reel of Tatum publicly roasting Williams:

So, yeah. Tatum's latest jab was nothing new.

Boston's addition of Kristaps Porzingis this offseason made it unlikely that Williams would sign a contract extension with the Celtics, and he should have the opportunity for a larger role in Dallas after signing a four-year, $54 million deal with the Mavs.

The Celtics will miss Williams' defensive versatility and 3-point shooting, however, while Tatum will have to settle for taking shots at his good friend on social media instead of in person going forward.

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