Smart (foot) departs vs. Knicks

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Marcus Smart takes a charge in the second quarter versus the Knicks.BOSTON -- Boston Celtics rookie guard Marcus Smart suffered a left Achilles strain during Friday's game against the New York Knicks and the team announced he would not return.

Smart limped off the court early in the second quarter and was briefly attended to by team trainer Ed Lacerte on the bench. Smart appeared to test the foot on a courtside exercise bike before departing for the locker room with team physician Dr. Brian McKeon.

Smart missed 10 games in November after suffering a left ankle sprain and bone bruising after stepping awkwardly on an opponent's foot. The team eased him back in, but he played the best game of his rookie season in extended minutes on Monday night in Washington.

Smart drew a couple of charges early in Friday's game against the Knicks, which might have contributed to the injury.

Smart entered Friday's game averaging 6.6 points, 2.1 rebounds, 2 steals and 1.6 assists over 17.8 minutes per game in nine appearances. He was scoreless in four minutes against the Knicks.