The Dallas Mavericks might have to cope without Luka Doncic for a significant stretch of time.

Doncic left the game during the Mavericks’ 105-99 defeat against the Minnesota Timberwolves on Christmas Day, a likely injury occurring in the second quarter. With the Mavericks behind 48-38 and just under three minutes left in the half, Doncic seemed to sustain a non-contact injury to his leg. He hobbled off the court as the game continued, heading toward the locker room shortly after. The Mavericks confirmed he would not return for the rest of the game due to a left calf strain.

There are concerns that Doncic’s absence could last longer than initially anticipated. As reported by ESPN, the Mavericks are bracing for the possibility that Doncic could be sidelined for “an extended period” because of this injury. On his way out of the American Airlines Center, Doncic was seen using crutches and is scheduled to undergo an MRI on Thursday.

So far this season, Doncic has been performing exceptionally well, averaging 28.8 points, 8.5 rebounds, and 8.1 assists over 21 games.