Spurs clinch top seed by beating Blazers San Antonio Spurs' Tim Duncan, left, drives in front of Portland Trail Blazers' J.J. Hick...

Spurs clinch top seed by beating Blazers

San Antonio Spurs' Tim Duncan, left, drives in front of Portland Trail Blazers' J.J. Hickson during the first quarter of an NBA basketball game, Monday, April 23, 2012, in San Antonio. (AP Photo/Eric Gay)

San Antonio Spurs coach Gregg Popovich, left, greets his players during a timeout in the fourth quarter of an NBA basketball game against the Portland Trail Blazers, Monday, April 23, 2012, in San Antonio. San Antonio won 124-89, clinching the top seed in the Western Conference. (AP Photo/Eric Gay)

San Antonio Spurs' Tony Parker (9), of France, tries for a shot against Portland Trail Blazers' Hasheem Thabeet, left, and Raymond Felton, center, during the first quarter of an NBA basketball game, Monday, April 23, 2012, in San Antonio. (AP Photo/Eric Gay)

Portland Trail Blazers' Nolan Smith, left, shoots as San Antonio Spurs' Patty Mills defends during the fourth quarter of an NBA basketball game, Monday, April 23, 2012, in San Antonio. San Antonio won 124-89. (AP Photo/Eric Gay)

San Antonio Spurs' Danny Green (4) goes up between Portland Trail Blazers' Luke Babbitt (8) and Nolan Smith (4) during the first quarter of an NBA basketball game, Monday, April 23, 2012, in San Antonio. San Antonio won 124-89. (AP Photo/Eric Gay)

Tim Duncan (21) of the San Antonio Spurs drives to the basket against Hasheem Thabeet #34 of the Portland Trail Blazers at the AT&T Center on April 23, 2012 in San Antonio, Texas

Portland Trail Blazers' Raymond Felton (5) drives into San Antonio Spurs' Stephen Jackson during the second quarter of an NBA basketball game Monday, April 23, 2012, in San Antonio. (AP Photo/Eric Gay)

Tim Duncan scored 18 points as the San Antonio Spurs clinched the top spot in the Western Conference after beating the Portland Trail Blazers 124-89 on April 23.