Tied up: Giannis’ tip-in lifts Bucks over Celtics in Game 4

MILWAUKEE, WI - APRIL 22: Giannis Antetokounmpo #34 of the Milwaukee Bucks goes up for a dunk over Al Horford #42 of the Boston Celtics during Game Four of Round One of the 2018 NBA Playoffs at the Bradley Center on April 22, 2018 in Milwaukee, Wisconsin. The Bucks defeated the Celtics 104-102. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Jonathan Daniel/Getty Images)

MILWAUKEE — Giannis Antetokounmpo scored 27 points, including tipping in the go-ahead basket with 5 seconds left, and the Milwaukee Bucks beat the Boston Celtics 104-102 on Sunday to tie their first-round playoff series at two games apiece.

Boston’s Marcus Morris missed a 14-footer at the buzzer with Khris Middleton’s hand in his face to seal a nail-biting win for the Bucks.

Seconds earlier, the 6-foot-11 Antetokounmpo jumped and reached up with his left arm around Boston’s Jayson Tatum to put back Malcolm Brogdon’s missed layup for the game-winner.

Game 5 is Tuesday night in Boston.

Jaylen Brown had 34 points for the Celtics, while Tatum added 21. Tatum’s 18-footer with 52 seconds left gave the Celtics a brief 100-99 lead.

He just couldn’t hold off Antetokounmpo on the other end for the decisive tip-in.

The disappointing end for the Celtics overshadowed their spirited rally from a 65-45 deficit with 7:37 left in the third quarter. Play got chippy and the Celtics limited the Bucks’ transition game.

They came up one basket short at the end.

Tip-ins

Celtics: Coach Brad Stevens kept his starting five intact after the team never recovered from a disastrous first quarter in Game 3. Stevens said he would likely only make a switch for matchup purposes. … Boston ended with a 43-36 edge on the boards. … Morris finished with 13 points and shot 4 of 14.

Bucks: Starting C John Henson missed a second straight game with a sore back. … The Bucks went with the same starting five as Game 3, with Zeller replacing Henson and Brogdon starting for Tony Snell. … Jabari Parker led a vigourous effort off the bench with 16 points and seven rebounds. Backup C Thon Maker blocked five shots and played most of the fourth quarter.

Up next

Game 5 is Tuesday at the TD Garden in Boston.