Kemba Walker said that the Boston Celtics need to "play harder" following their 104-91 loss to the Washington Wizards, the team's worse loss of the season.

"[We] just need to play harder. That's it. We're not playing hard. We're not playing as hard as we know we can," said Walker after the game.

Walker and Jaylen Brown each scored 25 points, while the rest of the team shot 12-for-51 from the field. 

The Celtics are now 13-13 on the season.

Brad Stevens said that his team needs to go back to emphasizing the basics.

"I know we've talked a lot about lineups and consistency and who plays and who doesn't play. Guys that really move the ball or guys that really run the spots and really execute hard have probably got to be the priority, playing-wise, for now around our very best players. And I think that that's where we're gonna have to get to, because that's clearly an issue."