According to Chris Sheridan, it says right in the NBA rule book that any intentional physical contact with a referee will result in an automatic suspension.

“PHYSICAL CONTACT—SUSPENSION:
Any player or coach guilty of intentional physical contact with an official shall automatically be suspended without pay for one game. A fine and/or longer period of suspension will result if circumstances so dictate.”

It looks the Boston Celtics, already without ailing shooting guard Ray Allen, will be without Rajon Rondo in Game 2 of their Eastern Conference quarterfinal match-up with the Atlanta Hawks.

https://twitter.com/#!/jadande/status/196772636913696768

https://twitter.com/#!/ESPNForsberg/status/196772386618605568

https://twitter.com/#!/h00psmaddie/status/196993256540737536

https://twitter.com/#!/craywalls/status/196992841363361792

https://twitter.com/#!/tyong9/status/196990540405932034

https://twitter.com/#!/PFRANCHIZE/status/196989631517040642

UPDATE: Rondo has officially been suspended one game by the NBA.

https://twitter.com/#!/KBergCBS/status/197068614518575105