BROOKLYN, N.Y. — The Celtics’ vulnerability on the defensive boards has been exposed this week. The Jazz had 18 offensive rebounds on Wednesday (a 98-93 Celtic win) and the Nets grabbed 18 (15 in the first half) on Thursday in taking a 102-97 victory.

“I see that as improvement,” coach Doc Rivers said of the Celtics’ second-half rebounding. “We almost caught them and tied them in offensive rebounds — they had six more, which is too many. We didn’t make any adjustments. We just fought more, we got into bodies, we helped less, we didn’t allow guys to beat us off the dribble as much. And I thought we did a better job.”