The Boston Celtics built their identity this season around defense. Whenever they were playing great, it was behind their defense, and any time they depended too much on offense, they struggled.
The Celtics have embraced as much versatility and dynamic defenders as possible, and it has put them in a position to be confident defending any team in the NBA. They have proven that they can slow down even the most elite defenses, but there will be adjustments next season.
Kyrie Irving spent enough time as a part of a great defense for the Celtics last season to be confident.