WALTHAM — Paul Pierce  made a admission on Saturday following practice.
The Celtics  had some words amongst each other about what was happening on their home court in three straight losses – or more to the point, what wasn’t. And that turmoil was evident several times on Friday as Rajon Rondo  had animated discussions with Shelden Williams  and Pierce during the fourth quarter as the Celtics were trying to get their defensive house in order.
The team’s ability to defend the simple pick-and-roll was exposed as an apparent weakness on Friday as Aaron Brooks, Kyle Lowry  and Luis Scola went to town late in the fourth quarter as the Rockets battled back to force overtime and then erased a five-point hole in OT to score the last 10 points of overtime in the 119-114 Rockets win.
“I think we’re breaking down in just one area,” Pierce said. “And it needs to get better. We have to be better on the pick and roll.”
In other words, when the opposing player passes the ball, a fundamental rule in basketball defense 101 is that the passer becomes the most dangerous potential scorer on the court.
“I think we trust each other,” Pierce said. “It’s just about going out there and doing it and trusting the coaching staff. The good thing about us after a game like [Friday] or the game before, we sit in the locker room and we talk about it. We were in the training room, talking about what we need to do better and what we need to do as a team. That’s a positive sign, how during a tough stretch like this, we stick together and talk things out.”
And that talk continued from Friday night post-game to Saturday pre-film study as Pierce said the team had an animated and frank discussion of the mistakes being made, with everyone in green taking some responsibility.
Now with LeBron James , Antawn Jamison  and the NBA-leading Cavaliers coming to town Sunday, the Celtics are just hoping their film study and practice on Saturday is enough to pass the huge test.
He didn’t want to get into it after Friday’s loss, but Celtics coach Doc Rivers  gave several examples on Saturday of the problems that led to his team’s meltdown.
There was the lack of respect given to 3-point sharpshooter Chase Budinger, after several reminders from the coaching staff to get in his face and stick with him on defense. They failed.
There was the shot taken by Nate Robinson  at the end of the second quarter, leading to a three-point swing that gave Houston a four-point lead instead of one. And there was Pierce dribbling out the clock before halftime without getting off a shot.
All of that said, Saturday was a time to look forward to preparing for the Cleveland Cavaliers , a team that beat them by 20 on the same court on Feb. 26. Looking back on Friday’s loss on film was not what Doc ordered on Saturday.