The instructions for Ja Morant for his game-winning lay-up were as simple as "go get a bucket, Ja" in the Memphis Grizzlies' 111-109 win over the Minnesota Timberwolves on Tuesday.

Morant landed the decisive bucket from the final play with scores locked at 109-109 with 3.7 seconds to play, putting Memphis 3-2 up in their first round NBA playoffs series.

The NBA's Most Improved Player received Dillon Brooks' inbound, losing Anthony Edwards who went for the steal, before driving and putting in an under-handed lay-up past Jarred Vanderbilt.

"Go get a bucket, Ja," Morant told reporters when asked about the instructions for the final play.

Morant scored 18 fourth-quarter points after struggling with 12 until three-quarter time, appearing to be sparked after a dunk in the third quarter.

"I wasn’t that excited about the dunk," he said. "It was over a guard, that's pretty easy.

"Definitely ignited the crowd, gave us some energy, from then on being very aggressive."

The Grizzlies had trailed by 11 points in the last quarter before their rally led by Morant, but the All-Star said he was "tired" of being forced to fight back. Memphis had clawed their way back from 26 points down in Game 3 to win 104-95.

"It feels good when you win," Morant said. "Me personally, I'm tired of it. I'm tired of playing from behind.

"Game 2 you see what happened when we come out and play from the jump. We've got to have that mindset like we had in Game 2 in Game 6 [on Friday] not give them too much life to go ahead.

"We need to start early. The last three games we haven't played our basketball, not knocking down our shots but we battle."

Meanwhile, Timberwolves center Karl-Anthony Towns, who had 28 points with 12 rebounds, bemoaned letting another lead slip.

"It's a tough pill to swallow," Towns said. "You feel like you got it after all the mistakes made and everything like that.

"We hit a big three to tie the game up with four seconds (left). You feel good. You feel good about going into overtime and having a chance to win the game. Just a learning experience."