Boston Celtics legend Paul Pierce says the Celtics need to “play harder” in Game 4 against the Milwaukee Bucks on Monday.

Pierce was surprised by the lack of intensity the Celtics played with in Game 3. The Bucks won Game 3 by a final score of 123-116 to reclaim home-court advantage in the series.

Pierce says the Celtics don't need a new gameplan to defeat the Bucks. The future Hall of Famer believes Boston just needs to show more energy and grit on both ends of the floor, something which was lacking in Game 3.

“They don’t need a different game plan. They’ve just got to play harder,” Pierce told Steve Bulpett of the Boston Herald. “The amazing thing to me is they didn’t play like they needed the game [Game 3]. When I watch the Portland games and the other games, you’re seeing guys diving on the floor. I don’t see none of that from the Celtics.”

The Celtics, a trendy title pick before the season tipped off, have been inconsistent through 2018-19. There are some nights where Boston looks like the best team in the Eastern Conference, and then there are other games where they look like they have no clue what they're doing on the floor. Case in point: The Celtics blew out the Bucks in Game 1, but have been thoroughly outplayed ever since.

Game 4 is a must-win for the Celtics. They can't afford to go down 1-3 with the series shifting back to Milwaukee for Game 5.