Boston go into the second game of this series looking to double their lead before they head out on the road.
The Celtics produced a dominant display in Game 1 as they downed Dallas 107-89 at the TD Garden.
That victory continued a strong postseason run that has seen them win 13 of their 15 games, and each of the last eight.
Boston compiled a league-best 64-18 record during the regular season, only to stumble early in the postseason as they split their first two games with Miami.
The Celtics’ response was an emphatic one though, as they recorded back-to-back blowout wins on the road, before returning home to seal the series with a 118-84 victory.
That pattern repeated itself in the second round as they took five games to dispatch Cleveland.
Boston split the first two games with the Cavaliers, but again responded to a Game 2 defeat with three consecutive victories, reeling off 106-93, 109-102 and 113-98 victories to advance.
There would be no repeat in the Eastern Conference Finals however, as they swept Indiana with 133-128 (OT), 126-110, 114-111 and 105-102 wins.