Kristaps Porzingis left the Golden State Warriors‘ 115-101 loss against the Detroit Pistons with lower back spasms on Friday night.

The injury occurred in the first quarter when his back tightened up before getting worse in the second quarter.

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Porzingis told reporters that he is unlikely to play on Saturday, when the Warriors take on the Atlanta Hawks.

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Dribble into this collection of dunk photos as NBA stars posterize opponents

Oct. 26: The Dallas Mavericks’ Cooper Flagg dunks the ball past the Toronto Raptors’ Sandro Mamukelashvili at the American Airlines Center.

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Dribble into this collection of dunk photos as NBA stars posterize opponents

Oct. 26: The Dallas Mavericks’ Cooper Flagg dunks the ball past the Toronto Raptors’ Sandro Mamukelashvili at the American Airlines Center.

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Dribble into this collection of dunk photos as NBA stars posterize opponents

Oct. 26: The Washington Wizards’ Cam Whitmore dunks the ball against the Charlotte Hornets at Capital One Arena.

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Dribble into this collection of dunk photos as NBA stars posterize opponents

Oct. 26: The Brooklyn Nets’ Michael Porter Jr. dunks in front of the San Antonio Spurs’ Victor Wembanyama at Frost Bank Center.

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Dribble into this collection of dunk photos as NBA stars posterize opponents

Oct. 25: The Denver Nuggets’ Christian Braun dunks the ball against the Phoenix Suns’ Grayson Allen at Ball Arena.

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Dribble into this collection of dunk photos as NBA stars posterize opponents

Oct. 24: The Memphis Grizzlies’ Jaren Jackson Jr. dunks against the Miami Heat at FedExForum.

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Dribble into this collection of dunk photos as NBA stars posterize opponents

Oct. 24: The Miami Heat’s Bam Adebayo dunks over the Memphis Grizzlies’ Jaren Jackson Jr. at FedExForum.

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Dribble into this collection of dunk photos as NBA stars posterize opponents

Oct. 22: The New York Knicks’ OG Anunoby goes up for a reverse dunk against the Cleveland Cavaliers at Madison Square Garden.

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Dribble into this collection of dunk photos as NBA stars posterize opponents

Oct. 22: The Utah Jazz’s Lauri Markkanen dunks against the Los Angeles Clippers at Delta Center.

The Hawks traded the Porzingis to Golden State in February.

“We’ll see,” Porzingis said. “Maybe it loosens up tomorrow. Who knows? But right now it’s pretty stiff.”

Porzingis had recently returned to the Warriors’ rotation earlier this month after missing time due to an illness.

This article originally appeared on USA TODAY: Kristaps Porzingis leaves Warriors’ loss to Pistons with injury