The Nets had lost five games in a row before the 102-100 win but Pierce believes that the recent run of poor form has improved the team spirit in Brooklyn.
"The difference was in our attitude," the 15-year NBA veteran told reporters. "There was an attitude adjustment among the players. We're just tired of getting pushed around.
"This team has a lot of pride, a no-give-up type attitude and guys were really feeling it. Some locker rooms break apart when you go on losing streaks, but I think it's bringing us closer together."
Brooklyn face the Los Angeles Lakers on Wednesday night.