The biggest question heading into tonight’s Knicks-Thunder game at Madison Square Garden is undoubtedly the status of Carmelo Anthony. The Knicks star sat out of Wednesday’s win over the Pistons in Detroit because of some fluid in his right knee. He had complained about soreness in the joint for over a week, but the injury didn’t become public knowledge until he exited Monday’s win over the Cavaliers in the first half. Anthony didn’t speak to the press in Detroit. Howard Beck of The New York Times on Carmelo Anthony: Anthony was ruled out of the game 90 minutes before tipoff. He was said to be improving, although his status for Thursday night’s home game against the Oklahoma City Thunder was uncertain. The Knicks have classified the injury as a stiff and sore knee, without elaboration. Coach Mike Woodson disclosed earlier Wednesday that the discomfort was being caused by fluid in the knee.