Antetokounmpo (knee/calf) has been downgraded to questionable for Tuesday's game against the Heat, Jamal Collier of ESPN.com reports.
Antetokounmpo was previously listed as probable due to a minor calf strain, though he has been downgraded to questionable with a left knee effusion as well. If the two-time MVP is unable to suit up for the NBA Cup matchup, Bobby Portis will likely draw the start.