The reigning rookie of the year's right foot landed on the foot of Heat guard Kendrick Nunn on a drive less than two minutes into the game Saturday night.
Doncic lost control of the ball for a turnover and limped off the court before going down behind the basket while play continued at the other end. He got up a short time later but went straight to the locker room. The team said X-rays were negative but he wouldn't return.
The 20-year-old is averaging 30.4 points, 9.9 rebounds and 9.3 assists per game while leading the resurgent Mavericks to the Southwest Division lead.
Doncic was playing two nights after dazzling a crowd in Mexico City with a pre-game speech in Spanish before scoring 41 points with 12 rebounds and 11 assists in a 122-111 victory over Detroit. It was his NBA-leading eighth triple-double of the season.
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