Derrick White's tie-breaking 3-pointer with 45 seconds left sent the Boston Celtics into the NBA Finals for the second time in three years with a 105-102 win over the Indiana Pacers in Monday's Game 4 of the Eastern Conference finals.

The top-seeded Celtics, who were ousted in seven games by the Miami Heat in last year's East finals, completed a sweep of this best-of-seven series by rallying from a nine-point deficit with under nine minutes left.

Jaylen Brown led Boston's comeback by scoring 10 of his 29 points in the fourth quarter and coming up with a key late block that preceded White's winning shot. The Celtics also received 26 points, 13 rebounds and eight assists from Jayson Tatum, as well as another strong performance from their backcourt duo of White and Jrue Holiday.

Holiday totalled 17 points and nine rebounds while White had 16 points on 7-of-14 shooting along with a game-high five steals.

The sixth-seeded Pacers were unable to extend the series while playing a second straight game without All-Star guard Tyrese Haliburton, who injured his hamstring in Thursday's Game 2.

Andrew Nembhard led Indiana with 24 points and 10 assists, while Pascal Siakam posted 19 points and 10 rebounds.

The Celtics will face the winner of the Western Conference finals between the Dallas Mavericks and Minnesota Timberwolves, and will host Game 1 on Thursday, June 6. The Mavericks lead that series 3-0 and can advance at home in Tuesday's Game 4. 

A tightly contested game saw neither side lead by more than eight points until the Pacers put forth a 5-0 run, capped by Nembhard's 3-point play with 8:57 left to play, to take a 94-85 advantage.

Indiana led 98-90 with under six minutes to go before the Celtics began catching fire. After Brown hit two free throws and Tatum knocked down a 3-pointer, Holiday drove the lane and was fouled while getting a layup to go down following a made basket by Nembhard. Boston's veteran guard calmly hit the ensuing free throw to bring the Celtics within 100-98 with 3:54 left.

It remained a two-point game until Brown knocked down a floater with 2:40 left to tie the score at 102-102. Shortly thereafter, the All-Star forward rejected Nembhard in the lane as Boston's Al Horford grabbed the rebound with the contest headed towards the final minute of play.

Brown then found an open White in the right corner, and the valued guard drained a 23-footer to send the Celtics ahead.

Indiana had one final chance to force overtime, but Nembhard's 3-point try missed the mark and the Pacers failed to get another shot off.