When a team takes a three-games-to-none lead in a best-of-seven series, it is time to start looking ahead to the next round or to a championship parade.
Most of the time.
In the history of sports, a few teams with 3-0 series leads have managed to lose three straight games before recovering. Some of them lost one more game — and the series — as well.
That’s the history facing the Miami Heat, who won the first three games of their N.B.A. Eastern Conference finals series against the Boston Celtics, then lost the next three, including Game 6 at home on Saturday night.