Rodions Kurucs suffered a spranked ankle in the Nets' 132-112 loss to the Pacers on Saturday night, according to the team.
Kurucs played well in the first half as he scored 12 points in nearly 15 minutes before he was forced out of the game.
Kurucs scored 11 points in Friday night's game when he grabbed five rebounds. He chipped in three points in the team's first game of the season against the Pistons on Wednesday.
The 20-year-old Kurucs, who hails from Latvia, was drafted by the Nets earlier this year and signed a multi-year deal.