INDIANAPOLIS — The Celtics haven’t swept a seven-game playoff series since the Pierce/Garnett/Allen troika beat the Knicks in four straight games in the 2011 first round.
To find another, there’s the 1986 conference finals, when the Celtics took four straight games from the Bucks.
So the opportunity the Celtics face Sunday in Game 4, with a 3-0 series edge against Indiana, is rare. The test is whether they have developed enough discipline to close out a failing opponent.
The fear is...