Jalen Brunson is fired up.

The Knicks star went at the officials in the third quarter of Game 5 against the Spurs in a heated protest of another non-call against San Antonio phenom Victor Wembanyama.

Brunson appeared to have legit beef after Wembanyama got away with a landing zone foul on a 3-point attempt with 5:35 left in the third quarter, with the Knicks guard landing on his foot and appearing to twist his ankle.

Brunson sat on the parquet for a moment as the Knicks fumed over the non-call.

Following a whistle at the other end of the floor — Devin Vassell hit a 3-pointer to extend the Spurs’ lead to 62-53 — Brunson immediately went at referee Tyler Ford.

“There’s no doubt he takes away his space in a close-out,” ESPN analyst Tim Legler said on the broadcast, “should be a flagrant.”

As coach Mike Brown pleaded his case to officials at half-court, Knicks veteran Jose Alvarado ushered Brunson away.

Wembanyama, one of the burgeoning faces of the NBA and an emerging Knicks villain, is one flagrant foul point away from a suspension, with his play heavily scrutinized by fans and analysts alike during this NBA Finals series.