New York Knicks coach Mike Woodson said he was "upset" that his team wore all black on Wednesday before Game 5 of the Knicks-Celtics series to mimic a funeral for Boston.

"I'm a little upset about that, and I've addressed that," Woodson said after practice on Thursday. "... Things like that have just got to be, just kept outside the game and just concentrate on playing basketball."

The Celtics trailed in the series 3-1, heading into Game 5 and forced a Game 6 with a 92-86 win at Madison Square Garden.

Kenyon Martin reportedly told his teammates after their Game 4 loss in Boston to wear black to Game 5, "funeral black," he said, in anticipation of the Knicks eliminating the Celtics.

Woodson said he did not know about the team's plan before the game. The coach said he learned about it Thursday morning and expressed his disappointment.

He said he "absolutely" would have prohibited the Knicks from wearing black if he had known about the idea.

"I made reference to our guys, you need to stay out of the papers and just concentrate on playing. That's not important. What you're wearing doesn't have anything to do with how you play on the basketball floor," Woodson said.