The Celtics finished the regular season with an NBA best record of 66-16. The last time the Celtics had 60+ wins was 1985-86, which was also the last time they won it all.
They won the #1 seed in the East, which means they get to play 8th seeded Atlanta. The Hawks were 37-45. The Celtics beat the Hawks in all three of their meetings this season. Atlanta never scored more than 90 points against the C's, and the C's never scored fewer than 98 points against the Hawks.
Here are the dates of the games:
Game 1: Sun 4/20 - 8:30 PM - vs. Atlanta
Game 2: Wed 4/23 - 8:00 PM - vs. Atlanta
Game 3: Sat 4/26 - 8:00 PM - @ Atlanta
Game 4: Mon 4-28 - 8:00 PM - @ Atlanta
Game 5: Wed 4/30 - TBD - vs. Atlanta
Game 6: Fri 5/2 - TBD - @ Atlanta
Game 7: Sun 5/4 - TBD - vs. Atlanta
Considering a 3-0 season series, and a .350 differential in winning percentage, the Celtics should sweep this series, or possibly win it in 5.