Dallas Mavericks rookie point guard dennis smith jr. had a rude awakening in his second game of NBA action, getting stopped at the rim by Draymond Green in an attempt to dunk over the Golden State Warriors forward during his team’s 30-point loss on Monday.

Green committed a foul, but was quick to engage the 6-foot-3 leaper, letting him know his dream of making a poster out of him, wasn’t happening. Ever.

“You ain’t never dunking on me. Ever. Never. Ever,” said Green after challenging the North Carolina State product.

Following the game, Green was just as dismissive of his attempt as he was during the game.

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“Yeah, that s*** ain’t happening,” said Green. “This ain’t summer league, bro. You ain’t just gonna dunk on nobody, better luck next time.”

“Never, it ain’t happening. Come on dude.”

The often controversial power forward noted he’s seen Smith’s antics over Instagram, but those are far from a reality he’s ever envisioned experiencing.

Green has proven to be every bit like his idol Ben Wallace, challenging guys at any height, weight, and length — and his fearless approach to the game goes for rookies and vets all the same, giving Smith his fair share of trash talk before he went on to miss the ensuing two free throws.

Smith had 10 points on 3-of-11 shooting and 4-of-10 from the line — a vast difference from his 16-point, 10-assist debut on opening night against the Atlanta Hawks.