The Atlanta Hawks have claimed another New York Knicks playoff scalp, winning 109-108 in Game 3 on Friday AEST to take a 2-1 lead in a massive series swing.

And while the Knicks rue “severe” late-game mismanagement in the past two games, a Hawks star’s old team might be having trade regrets after he put in a brilliant off-the-bench shift.

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The Hawks led by as many as 18 points in the first half at State Farm Arena, but almost gave it away, trailing 105-108 with 1:03 remaining in the game after a piece of Jalen Brunson brilliance.

A Jalen Johnson make with just under a minute left got Atlanta to within one, before veteran guard CJ McCollum hit the go-ahead mid-range jumper with 12.5 seconds remaining.

The Hawks then played suffocating defence on the game’s last possession, forcing a Jalen Brunson turnover as time expired.

Bendigo’s Dyson Daniels was industrious in the momentous win, scoring eight points but grabbing 13 rebounds, dishing six assists and notching three steals in an all-around performance.

And coming off the bench, forward Jonathan Kuminga showed up for his new ball club, scoring 21 points on an uber-efficient 64 per cent field-goal shooting.

The former Warrior’s length and athleticism continue to make him a tough defensive proposition, while he was also ferocious on the glass.

Kuminga also produced the result-sealing steal on Josh Hart with a few seconds remaining.

Renowned NBA podcaster and writer Kevin O’Connor wrote on X in reaction: “I wonder what Steve Kerr is thinking watching Jonathan Kuminga go off for the Hawks in the playoffs.”

Atlanta traded with Golden State for Kuminga in February, affording the fledgling wing a fresh start after five years with the seven-time NBA champs.

The 23-year-old has a team option for US$24.3 million (AU$34 million) next season, and he’s putting his best foot forward right now to ensure the Hawks don’t have a choice but to pick it up.

Three days earlier, Kuminga dropped 19 points and four rebounds in New York as Atlanta claimed a Game 2 victory at Madison Square Garden.

New York, meanwhile, licks its wounds as multiple examples of “severe timeout mismanagement” were called out, with the Knicks now looking to avoid a third-straight loss when the sides meet again in Atlanta on Sunday morning AEST.