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Rajon Rondo was at the center of a scrum during the Nets-Celtics game that left three players ejected in Boston's 95-83 loss.

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The fight stemmed from Rondo's reaction to a hard foul Brooklyn's Kris Humphries, center, committed on Kevin Garnett, left.

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Rondo took a swing at Humphries, which ignited a fracas and led to an ejection for the Celtics guard.

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Celtics coach Doc Rivers was upset with the combined effect of the fight and the loss. "That was awful, basketball-wise," he said.

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Head official James Capers blamed Rondo for the fight. Rondo, he said, "initiated everything" after the foul.

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Several other players jumped into the fight after Rondo took the swing at Humphries.

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The fight spilled over into the first row of fans under the basket.

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Rondo, Humphries and the Nets' Gerald Wallace were ejected.

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It was the third ejection in 10 months for Rondo, who could face a suspension now.

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Paul Pierce sat alone on the bench as officials sorted out the penalties following the fight.