Round: Eastern Conference Quarterfinals
Dates: April 18-May 2
Winner: Celtics, 4-3
The stakes weren't as high as other series on this list, but this is arguably the greatest first-round series ever, and, thrill-for-thrill, one of the greatest series in any sport. Boston's title defense was shaken by Kevin Garnett's midseason knee injury, however they refused to be derailed by the young and hungry Bulls.

No team won two games in a row the entire series and five of the seven games were decided by a single basket. Game 1 in Boston went to overtime. So did Game 3. Game 4 went to double OT. Game 5 went to overtime and Game 6 was a triple overtime thriller. The anticlimactic Game 7 went to the C's, but it's a shame this one ever had to end.