Celtics coach Doc Rivers knows his team, even in the midst of an eight-game winning streak, can’t go on rebounding like they are if they are to have any chance of hanging an 18th banner from the rafters.

On Tuesday night, the Celtics went on a very late 7-0 run to pull away from the Milwaukee Bucks, 98-89, for their eighth straight and a very gaudy 17-4 record.

What’s not so gaudy are their rebounding numbers.

They were outrebounded 44-35 by a younger, quicker Milwaukee team, including 14-5 on the offensive glass. The Celtics entered the game 29th in the NBA, or next-to-last, in rebounding. They are dead last in offensive rebounding.

Paul Pierce and Rajon Rondo both took responsibility afterward, saying the guards must pick up the pace when it comes to rebounding.

Pierce said the guards need to rebound better.

Rondo said part of good guard play is rebounding.

Doc Rivers said the Celtics can’t go on like this forever.