If this is what workload management looks like, the Knicks may already have cause for concern.

Mitchell Robinson hasn’t played or practiced in nearly two weeks — including Monday’s workout in Tarrytown — with just two days remaining before Wednesday’s season opener against the Cleveland Cavaliers .

Head coach Mike Brown said both Robinson and Josh Hart were nonparticipants in practice, extending Hart’s absence to almost three weeks since suffering back spasms during the preseason opener in Abu Dhabi against the Philadelphia 76ers.

Brown said Hart is at least trending upward.

“Before he wasn’t able to do anything. Now he’s out there — I can see him doing some stuff on the sidelines, going up and down,” Brown said.

Robinson’s case, however, is more complicated. The 7-foot center is

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