Tim Duncan (knee) has been ruled out for Tuesday's matchup with the Heat, Tim Reynolds of the Associated Press reports.

Duncan (knee) has been ruled out for Tuesday's matchup with the Heat, Tim Reynolds of the Associated Press reports.

Analysis:

Duncan was upgraded to questionable Monday, but it's unlikely that he ever had much of a chance to take the floor, as he'll now sit out his ninth consecutive game. The Spurs will play the Magic in the second half of a back-to-back Wednesday night, and it would remain surprising if Duncan is active with the extended All-Star break to follow. In the veteran's absence Tuesday, expect David West and Boris Diaw to see some extra run.