The collapse comes two nights after Boston blew an 18-point lead at home to the Los Angeles Lakers, but forward Marcus Morris is more concerned about the Celtics' demeanor than the two-game skid.
"I mean, for me, it's not really about the loss," Morris said, according to ESPN. "It's about the attitude that we're playing with. Guys are hanging their head. It's just not fun, it's not fun. We're not competing at a high level. Even when we're winning it's still not fun. I just don't see the joy in the game.
"I watch all these other teams in the league, guys up on the bench, up on the court; they're doing stuff that looks like they're enjoying their teammate's success, they're enjoying everything and they're playing together. And when I look at us, I just see a bunch of individuals."
With the NBA's trade deadline in the rearview mirror, Morris knows that there aren't any major reinforcements coming to the rescue. The 29-year-old is committed to doing whatever it takes to win, even if it means taking himself off the court.
"For us to be a championship team, man, this s--- has to change," Morris said. "We have to genuinely want to win. That has to be the first goal. Whatever it takes, I'm with it. If you want to take me out the lineup and get some juice in it, I'm with it. But I'm trying to win. That's the goal.
"Trade deadline's over. This is the team we're rocking with. This is what we're going with. So, at the end of the day, man - it's unacceptable what we did tonight. It's unacceptable for what we did with a team of our caliber."
The Celtics (35-21) currently sit fifth in the Eastern Conference.