Anthony Siegler had the tie-breaking sacrifice fly in the 10th inning Sunday for the visiting Boston Red Sox, who won their ninth straight game by edging the New York Mets 3-2 in the finale of a three-game interleague series.

The Red Sox forced extras in the ninth, when Andrew Monasterio had a bases-loaded walk and Jarren Duran had an RBI single. Connor Wong led off the 10th by sacrificing Masataka Yoshida to third before Siegler followed with a fly ball three pitches later against Brooks Raley (4-4).

Monasterio, Duran, Connor Wong and Ceddanne Rafaela had one hit each for the Red Sox, whose winning streak is their longest since a 10-game run last July.

This winning streak has been built entirely on the road by the Red Sox, who swept three-game sets from the Los Angeles Angels and Chicago White Sox before never trailing the Mets on Friday or Saturday.

Aroldis Chapman (1-3) worked around Jared Young’s one-out single in the ninth and Garrett Whitlock notched his second save by retiring all three batters in the 10th.

Francisco Lindor had a run-scoring double in the first and homered in the sixth before his one-out error extended the ninth inning for the Mets, who fell to 4-7 this month.

Red Sox starter Payton Tolle allowed one run on three hits and one walk while striking out seven over 3 2/3 innings.

Mets rookie Zach Thornton, pitching in the majors for the first time since June 26, gave up two hits and walked two while striking out five over seven innings. Thornton didn’t allow a hit until Monasterio doubled to left field with one out in the fifth.

Luke Weaver threw a 1-2-3 eighth before Rafaela began the Red Sox comeback by singling to lead off the ninth against closer Devin Williams, who got Wilyer Abreu to pop out before Romy Gonzalez grounded to short.

But Lindor misplayed the ball and Caleb Durbin walked to load the bases before Rafaela trotted home on Monasterio’s walk. Duran singled home pinch-runner Tsung-Che Cheng on an 0-1 pitch.

–Field Level Media