SportsCenter conversation with Gregg Popovich

The greatness of Tim Duncan built on selflessness (1:56)

Bruce Bowen reflects on the Hall of Fame career of five-time champion Tim Duncan, which was built on selflessness and structure. (1:56)

With the San Antonio Spurs retiring Tim Duncan's famed No. 21 on Sunday night, we arranged a SportsCenter sitdown with the only coach Duncan has ever known -- Gregg Popovich -- to discuss their one-of-a-kind partnership.