CHICAGO — The Pistons were losing their cool. Moments after Rasheed Wallace was called for a technical foul, Tayshaun Prince held his arms out, upset about a non-call.

Detroit had no reason to feel good on Sunday, not after the Chicago Bulls won game 4 of the Eastern Conference semifinals 102-87 on Sunday, denying the Pistons a sweep.

“Now we got a series,” Detroit coach Flip Saunders said. “Both teams have gotten beat, and so now you got a series. They’re not going to give us anything.”

The Pistons will try to wrap up this series at home on Tuesday.

Detroit rushed shots, took 25 3-pointers. A defense that stifled the Bulls in the first three games suddenly had trouble stopping them.

Luol Deng scored 25 points, and Kirk Hinrich and Ben Gordon added 19 apiece.

“I don’t care who it is, we are better than being swept in four games,” Ben Wallace said. “We just have to come out and fight.”