Spurs center/forward Tim Duncan is listed as day-to-day with a sore left knee and mild right ankle sprain after an MRI revealed no structural damage following his injury in Saturday's victory over Washington.

Washington's Martell Webster rolled into the back of Duncan's legs late in the first half after his driving shot was blocked by Kawhi Leonard. Duncan, 36, stayed down on the ground for several minutes, clutching his left knee, before he was helped off the floor by teammates Stephen Jackson and DeJuan Blair.

Television cameras later showed Duncan walking under his own power. Multiple teammates said after the game they were not overly concerned after Duncan left the AT&T Center without crutches.

Duncan was making his return after sitting for four games with a sore left knee. Duncan said he suffered that injury after coming down wrong during the Spurs' victory at Philadelphia on Jan. 21. He finished the Wizards game with eight points and five rebounds in 13 minutes.

Recently selected to his 14th All-Star Game, Duncan is averaging 17.3 points, 9.7 rebounds and 2.7 blocks with a 24.9 Player Efficiency Rating in his 16th season.

The Spurs (38-11) will begin their annual rodeo road trip in Minnesota on Wednesday. They'll play four more games over the next week before breaking for six days. The trip will conclude with an additional four games before the Spurs return home on Feb. 27 to face Phoenix.

The play on which Duncan was injured can be seen beginning at the 1:06 mark of the following highlight reel.