Six months after shock-wave therapy, occasional jolts of knee pain remain for Dwyane Wade.

Because of that, he opted to sit out Friday's game against the Brooklyn Nets at Barclays Center.

Wade said he made his decision based on the 39 minutes he played in Thursday's loss to the New York Knicks at Madison Square Garden and Friday's resulting discomfort.

"I want to be smart about that," he said about an hour before the Miami Heat played the back end of the back-to-back set of games. "It's just going off the pain. I decided not to because of the soreness."

Heat coach Erik Spoelstra stressed that it is Wade's level of comfort, and not the schedule, that is determining Wade's status. Friday was the ninth game Wade missed this season, seven due to the knee issue and one due to an illness. The Heat went into Friday night 4-4 in his absence.