Doc Rivers still close with Bulls' Tom Thibodeau

Boston Celtics coach Doc Rivers and Chicago Bulls coach Tom Thibodeau share a special bond from their time together in Boston. Thibodeau, an assistant for the 2008 Celtics championship team, said, "anytime you win a championship with somebody it ties you together forever."

Thibodeau was the assistant head coach of the Celtics under Rivers from 2007-2010 and was largely credited for their defensive prowess. He has since moved on to Chicago, but the two men remain close. Thibodeau said the two talk about basketball frequently, except when they are getting ready to play against one another.

Rivers joked that he is still picking up the tab when the two have dinner despite Thibodeau's recent contract extension. Despite the jokes, respect and admiration between the two, they agreed that the friendship takes a backseat during game time.

The Celics and Rivers beat Thibodeau and the Bulls on Monday night in Chicago, 101-95.