The Milwaukee Bucks beat the Detroit Pistons to establish an unassailable 4-0 lead in the best-of-seven play-off series and set up an Eastern Conference semi-final against the Boston Celtics.
The Bucks progressed in the post-season for the first time since 2000-01 with Monday's 127-104 win.
The Pistons set an NBA record with their 14th consecutive play-off defeat.
The Houston Rockets lost 107-91 to the Utah Jazz in the Western Conference but lead their series 3-1.
Bucks coach Mike Budenholzer said it was important his side "take a second to enjoy" their progress after failing to make it past the first round in eight previous attempts.
"It's a good night for Milwaukee. It's a good night for the Bucks," he added.