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From one rivalry to another

Duke-North Carolina one night; Celtics-Lakers the next. Yes, it's rivalry week for Celtics coach Doc Rivers. But he started it on the right foot while watching son, Austin, hit the winning 3-pointer to lift the Blue Devils on Wednesday night in Chapel Hill:

http://instagr.am/p/Gxa6z4yuFW/

Rivers has noted he tries to hide his emotions on the sideline because he knows the cameras will be cutting to him whenever his son makes a noteworthy play -- good or bad. But Rivers is probably just fine with the candid display of emotion.

Here's a look at the shot and Rivers talking about the experience: