Abreu’s single gives Red Sox a 5-4 walk-off win in doubleheader opener

Wilyer Abreu of the Red Sox reacts after hitting a walk-off RBI against the St. Louis Cardinals during the 10th inning at Fenway Park.BOSTON (AP) — Wilyer Abreu singled off the Green Monster to drive in the winning run in the bottom of the 10th inning, and the Boston Red Sox rallied for a 5-4 walk-off victory over the St. Louis Cardinals on Sunday in the opener of a day-night doubleheader.

Rafael Devers hit his first homer for the Red Sox, who won their fourth straight.

Boston had tied it with two runs on a hit and four walks against closer Ryan Helsley in the ninth. Romy Gonzalez had an RBI double in the inning.

Pedro Pagés replaced catcher Iván Herrera after he came out with left knee…