Jaylen Brown addresses what Boston Celtics are playing for during regular season's final week

The Boston Celtics don't have anything to play for in the regular season's final week relating to the postseason. As Jaylen Brown notes, though, that doesn't mean the team has nothing to play for in general.

Brown believes Boston is battling their past motivation issues.

"It’s a battle of the mind … We already clinched," Brown said (h/t NBC Sports Boston). "In a sense, we’ve done our job in the regular season. But now you prepare your minds for the moments where it’s going to matter most. You don’t want to relax, you don’t want to get complacent.

"Sometimes, even when you go out there, you have to pretend like it’s a playoff game and it’s not. And it’s just a battle of: How strong is your mind? Your focus? And that’s what we’re challenging ourselves with now. To see the second group go out there and be able to do what they’re doing and grow in those moments, and first group continue to be able to stay locked into every possession, that’s just going to help us down the line as a team."

Jaylen Brown has been talking about Boston Celtics' mentality all season

This isn't the first time Brown has addressed the Celtics' mental situation. Back in February, Brown talked about how the team that breaks mentally first will lose.

“It’s tough," Brown said (h/t NESN). "It’s a fight. It’s a mentality to be able to focus for long durations of time. I think that’s the challenge and in sports to have that ultimate focus because when you get deeper into the playoffs … the team whoever’s focus breaks first is going to be the team that loses.”

Brown seemingly has legitimate fears about Boston's ability to finish the job, but luckily, having a former NBA champion on the roster in Jrue Holiday will help the team lock in during the postseason.