The Celtics are enjoying a very good season despite all their injuries, but there has been one alarming trend.

Boston is 15-5 against teams with losing records, while Miami (23-3) and San Antonio (21-1) routinely beat up on sub-.500 teams.

Conversely, the Celtics are 18-5 against winning teams. The Heat are just 8-10.

"If you look at the whole season, we've had a terrific season so far," Doc Rivers said. "But if you look at that terrific season, we've had some bad losses. Those are tough losses for a team that shouldn't lose those games. More lessons learned and we've got to keep teaching them."

The Celtics have lost to the Cavaliers, Pistons, Raptors, Rockets and Wizards this season.

"The way to get up [for these games] is to look up at the banners and think about homecourt," Rivers said. "That's what should motivate you."