DALLAS, TX – DECEMBER 25: LeBron James #6 of the Miami Heat fouls Dirk Nowitzki #41 of the Dallas Mavericks during the NBA season opening game at American Airlines Center on December 25, 2011 in Dallas, Texas. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and/or using this Photograph, user is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Ronald Martinez/Getty Images)