The Cleveland Cavaliers and Indiana Pacers will tip things off on May 4, and the series could extend to May 18 if it goes the full seven games. The Boston Celtics will play either the New York Knicks or Detroit Pistons starting on May 5, and they could keep going as late as May 19.

The Cavaliers, Celtics, Pacers and Thunder have secured spots in the conference semifinals, but there's still plenty of first-round drama left.

One Eastern Conference semifinals series is set after the No. 4 Indiana Pacers eliminated the No. 5 Milwaukee Bucks in overtime Tuesday. The Pacers advance to take on the No. 1 seed Cleveland Cavaliers, who swept the No. 8 seed Miami Heat on Monday.