The 37-year-old came off before half-time in game one of the series after pulling up during the Warriors’ 99-88 win in Minneapolis.
The two-time MVP clutched the back of his left leg after a defensive play and initially tried to carry on before signalling to the bench that he needed to be replaced.
Buddy Hield, Jimmy Butler and Draymond Green shared the scoring burden in Curry’s absence, hitting 62 points between them.
Curry is likely to miss game two (Friday, 9 May, 01:30 BST) at least, as the Warriors wait on the results of the scan.
“We’re definitely game-planning for him to not be available for game two but we don’t know yet,” said Warriors coach Steve Kerr.
“With a hamstring, it’s hard to imagine that he would play.
“I talked to him at half-time, he’s obviously crushed. The guys picked him up and played a great game but we’re all concerned about Steph.
“It’s part of the game. Guys get hurt, you move on.”