BOSTON — Rick Porcello looked much more like a Cy Young candidate than Luis Severino on Friday night, and that’s hardly unexpected from the right-hander, who has made a habit out of dominating the Yankees.

In a 4-1 win by the Red Sox at Fenway Park, Porcello allowed just one hit — a third-inning homer to Miguel Andujar — after hitting Brett Gardner to start the game and faced just one batter over the minimum in an 86-pitch gem.

As the Yankees watch the Red Sox seemingly pull away in the AL East, pushing their lead to 7 ½ games, Porcello is a major reason why.

He took a no-hitter into the seventh inning April 12 at Fenway in a win in which he tossed seven scoreless innings. And while the Yankees got to Porcello for five runs in 5 ¹/₃ innings in a victory over Boston in The Bronx a month later, he once again got the best of them at Fenway on Friday.

In eight career starts at Fenway against the Yankees, Porcello is 5-3 with a 1.25 ERA, allowing just eight earned runs in 57 ¹/₃ innings.

“I don’t know,” the Seton Hall product and Morristown, N.J. native said when asked why he’d had so much success against the Yankees. “That’s a great question. I don’t pay attention to it, especially in our division, where every offense we face is tough.”

And even when he did reflect on it, Porcello was content just to have another victory.

“I don’t know why I pitch better against the Yankees than other teams,” he said. “I can’t really explain it.”

He insisted it wasn’t because he focused more when facing the Yankees.

“Some of the most focused games I’ve been in, I’ve given up six or seven runs,” Porcello said. “I don’t have an answer.”

That’s fine with Red Sox manager Alex Cora, who saw most of the game from his office after being tossed in the first inning.

“It was fun to watch,” Cora said.

Porcello drilled Gardner on an 0-2 pitch to lead off the game, then Severino started his outing by throwing up and in on Mookie Betts with his first pitch.

Warnings were issued to both benches, which is what set Cora off. Porcello didn’t lose his cool, but he said what happened impacted his approach.

“I definitely didn’t take it lightly,” Porcello said of Severino’s opening pitch. “I didn’t like it. … You understood the situation. You take that, put it in your back pocket and use it to your advantage as best you can. I had it in the back of my mind from the moment that it happened. You’ve still got to settle down and pitch a ball game.”