San Antonio Spurs coach Gregg Popovich, left, argues a call during the first quarter of Game 1 of the opening-round NBA basketball playoff series against the Dallas Mavericks, Sunday, April 20, 2014, in San Antonio. (AP Photo/Eric Gay)
San Antonio Spurs head coach Gregg Popovich looks for a three second call in the first half of an NBA basketball game against the Indiana Pacers in Indianapolis, Monday, March 31, 2014. (AP Photo/Michael Conroy)
San Antonio Spurs center Tim Duncan, left, confers with coach Gregg Popovich during a timeout against the Denver Nuggets in the fourth quarter of the Spurs' 133-102 victory in an NBA basketball game in Denver on Friday, March 28, 2014. (AP Photo/David Zalubowski)
San Antonio Spurs coach Gregg Popovich calls to players on the bench for a replacement against the Denver Nuggets in the fourth quarter of the Spurs' 133-102 victory in an NBA basketball game in Denver on Friday, March 28, 2014. (AP Photo/David Zalubowski)
San Antonio Spurs coach Gregg Popovich gives directions to his team during the first half of an NBA basketball game against the Denver Nuggets, Wednesday, March 26, 2014, in San Antonio. (AP Photo/Eric Gay)