The Boston Celtics allowed 20 offensive rebounds in Game 2,  which allowed the Knicks to stay in the game despite shooting 35 percent.

Celtics coach Doc Rivers put some of it on dribble penetration, but the bigger problem has been their help defense. “We’re helping but we’re not trapping and when the shot’s go up we’re just turning and going to the glass,” Rivers said. “That means the guy who was in help, there’s no one on his guy’s body. We showed that. That was our first 17 [film] clips.”

The Knicks have also clearly made attacking the glass a priority. “They’re sending all five guys to the glass and they’re not even trying to get some rebounds, they’re just trying to keep the ball alive as long as possible,” Rivers said. “They feel they have a speed advantage.”