He is averaging 17 points and 13 rebounds over his last six games .
Sparked by his 23 - point , 21 - rebound performance against Atlanta on Dec. 2 , Duncan has returned to vintage form after a slow start to the season .
Duncan is averaging 17 points and 13 rebounds over Duncan 's last six games .
Sparked by his 23 - point , 21 - rebound performance against Atlanta on Dec. 2 , Duncan has returned to vintage form after a slow start to the season .