Boston Celtics head coach Doc Rivers, right, argues a call with an official during the second quarter of an NBA basketball game, Saturday, Dec. 15, 2012, in San Antonio. (AP Photo/Eric

 

              Boston Celtics head coach Doc Rivers, right, argues a call with an official during the second quarter of an NBA basketball game, Saturday, Dec. 15, 2012, in San Antonio. (AP Photo/Eric
Boston Celtics head coach Doc Rivers, right, argues a call with an official during the second quarter of an NBA basketball game, Saturday, Dec. 15, 2012, in San Antonio. (AP Photo/Eric Gay)