The Dallas Mavericks downgraded Luka Doncic to questionable for Game 2 of the NBA Finals against the Boston Celtics on Sunday.

With the Mavericks in danger of dropping the first two games in Boston, the injury designation from probable was made about 6 1/2 hours prior to tip-off.

He was also diagnosed with new ailment on the report, with a thoracic contusion being added to prior injuries of a right knee sprain and left ankle soreness.

Video posted of him from Saturday's practise showed the five-time All-Star holding his chest while appearing to be in some pain.

Doncic has routinely been listed on the injury report throughout the play-offs, but has yet to miss a game in the post-season.

Despite dealing with multiple injuries, he's still averaging 28.8 points, 9.7 rebounds and 8.4 assists in the play-offs.

In Dallas' 107-89 loss to Boston in Thursday's Game 1, he finished with 30 points, 10 rebounds and one assist.