BOSTON — After further review . . . maybe Major League Baseball’s replay system needs reviewing.

The Yankees found themselves on the short end of back-to-back replay decisions, one in which there didn’t seem to be conclusive evidence and one in which there seemed to be, that led to the ejections of Aaron Boone and DJ LeMahieu in a 2-1 loss in 10 innings to the Red Sox at Fenway Park.

After Aaron Judge hit a 443-foot home run over the Green Monster to tie the score with one out in the ninth, the Red Sox won it in the bottom of the 10th, 2-1, on Carlos Narvaez’s two-out RBI single off the Green Monster off Tim Hill.

Hill nearly escaped a first-and-third, one-out jam, striking out Marcelo Mayer (with the Yankees playing five infielders) and getting ahead of Narvaez 1-and-2 before the former Yankee came through.

But the real theater took place in the top half of the inning.

With Garrett Whitlock on for Boston and Jasson Dominguez at the plate, ghost runner Anthony Volpe took off for third. He initially was called safe, the Red Sox challenged and the call was overturned. Still hot after the game, Boone felt replay central in New York probably got that one right — but not the second.

LeMahieu smoked one down the rightfield line that first base umpire Jeremie Rehak called foul. The Yankees challenged and the call was upheld despite a replay shown on the big screen in centerfield that appeared to show the ball clipping the line.

“That’s a fair ball,” Judge said.

Which was enough for Boone, who yelled at plate umpire John Tumpane and then whipped his gum onto the field in frustration, prompting the manager’s 42nd career ejection and third of this season (on-field personnel are prohibited from arguing replay decisions, which are made by umpires in New York).

“Fair ball down the line that they miss in real time and don’t have the courage to overturn,” said Boone, who by the time he met with the media already had been on the phone with Michael Hill, MLB’s senior vice president of on-field operations. “I want the courage to overturn the call. A quarter of the ball’s on the line . . . so, whatever, it’s over with. Not saying we score there. In the end they outlasted us tonight.”

The real shocker came after LeMahieu grounded out. He said something to Rehak and was thrown out, marking the first time he has been ejected in his 15-year career.

“Of all the things I’ve said to umpires, I was pretty surprised,” LeMahieu said.

What did he say?

“I just said, ‘That was a brutal call,’ ” he said. “He [Rehak] said, ‘What did you say?’ I was like, ‘That was brutal.’ That was it. Obviously, it’s a high-intensity moment in the game and high pressure and emotions are running high.”

In the ninth, too, when Judge tied it against Boston ace Garrett Crochet, who figured — and with good reason, given his success against Judge — that he could get one more fastball past the reigning AL MVP.

Judge had struck out three times against Crochet — swinging at a 98-mph fastball, looking at a 97-mph heater and swinging at a 99-mph fastball. That dropped him to 0-for-6 with six strikeouts vs. Crochet this year.

With the Red Sox ahead by a run, Crochet, two outs away from a complete game, put a tad extra on his 107th pitch of the night, a full-count, 99.6-mph fastball. But there was little movement as it arrived just about belt-high and Judge, looking fastball, didn’t miss. The ball rocketed off his bat at 115.5 mph, easily cleared the Green Monster in left and eventually landed on Lansdowne Street outside Fenway, tying the score at 1-1 and giving him his 26th homer, tied with Seattle's Cal Raleigh for the MLB lead.

“Really just trying to get on base to spark a rally,” Judge said. “Was happy to tie it.”

Said Boone: “Just demolished. Just a great at-bat.”

Crochet, who came in 6-4 with a 2.35 ERA, allowed four hits and a walk in 8 1⁄3 innings in which he struck out seven. Yankees lefthander Ryan Yarbrough allowed one run, four hits and three walks in 4 2⁄3 innings.

The Yankees (42-26) had few scoring chances. Before Judge’s homer, their best one against Crochet was a first-and-third, none-out situation in the fifth in which they came up empty. Crochet struck out Austin Wells on three pitches, struck out Oswald Peraza on three pitches and fell behind Paul Goldschmidt 3-and-0 before getting him to ground out on a 3-and-1 pitch.