Boston’s Jayson Tatum tries to get past Milwaukee’s Wesley Matthews during the second half the Celtics’ 108-95 win in Game of their Eastern Conference semifinal series on Friday in Milwaukee. Tatum scored 46 points. Morry Gash/Associated Press

MILWAUKEE — Jayson Tatum scored 46 points, outdueling Giannis Antetokounmpo and making sure there wouldn’t be another Milwaukee Bucks fourth-quarter comeback, and the Boston Celtics beat the defending champions 108-95 on Friday night to force a seventh game in their Eastern Conference semifinal series.

The third straight victory for a road team sets up a winner-take-all game Sunday afternoon in Boston. The victor heads to Miami to begin an East finals matchup with the top-seeded Heat on Tuesday.

Boston showed its grit by bouncing back two nights after blowing a 14-point, fourth-quarter lead in a 110-107 Game 5 home loss. The Bucks tried to rally again after trailing by 14 points in the final quarter, but this time Tatum kept the Celtics on top and kept their season alive.

Antetokounmpo had 44 points, 20 rebounds and six assists. His 20 rebounds were one off his career high.

Jaylen Brown scored 22 points and Marcus Smart had 21 for the Celtics, who capitalized on their superiority from 3-point range. The Celtics were 17 of 43, and the Bucks were 7 of 27 from beyond the arc.

Antetokounmpo tried to lead the Bucks to a second straight improbable comeback.

Boston led 84-70 in the opening minute of the fourth quarter and was up 84-73 when officials ruled Grant Williams had drawn a charge for Antetokounmpo’s fifth foul. But the Bucks challenged the call and it was overturned on replay, instead sending Antetokounmpo to the line. He made both free throws to start an 8-0 run. The Bucks trimmed the margin to 85-81 on Antetokounmpo’s 3-pointer with 8:42 left.

Tatum wouldn’t let the Bucks get any closer. He scored the Celtics’ next 11 points, including a fadeaway jumper as the shot clock expired plus a couple of 3-pointers.

Tatum and Brown each hit a 3-pointer during an 8-0 spurt that closed with Smart’s jumper that made it 100-87 with 4:20 remaining.

TIP-INS

Celtics: Tatum has scored at least 30 points in three straight games. … After going a combined 5 of 27 on 3-point attempts in Games 3-5, Tatum was 7 of 15 on Friday. … The Celtics were 10 of 17 from 3-point range in the game’s first 14 1/2 minutes.

Bucks: A moment of silence was held before the game to honor Hall of Famer Bob Lanier, who died Tuesday at the age of 73. Lanier played for the Bucks from 1980-84, and his No. 16 jersey hangs from the Fiserv Forum rafters. … An estimated 10,000 fans filled the Deer District outside Fiserv Forum.

CREW CHIEF CHANGE

Scott Foster, the scheduled crew chief for Game 6, couldn’t officiate because of an illness unrelated to COVID-19. Eric Lewis took over as crew chief, with Ben Taylor working as the referee and Tre Maddox as the umpire.