Two sources close to the situation told ESPN.com that Sloan reacted angrily during Wednesday night's home loss when guard Deron Williams called his own play on the floor different from the play Sloan called from the sideline.
That led to an emotional dispute at halftime, sources said, which was followed by Sloan's closed-door meeting with O'Connor after the game.
But one source stressed that the play-calling flap was just one incident among a number of flare-ups in recent weeks, indicating Sloan's relationship with Williams has been deteriorating.
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