Opener or ace, injury after injury, none of that matters as these Yankees keep beating terrible teams.

Keep being bullies, Yankees, even if it is with a second layer of players.

The Yankees have stolen a page from the 2018 World Champion Red Sox, who won 108 games, along the way going 16-3 against the Orioles and 5-1 versus the Royals. That is how the Red Sox created their AL East advantage over the 100-win Yankees.

That’s the mission for these Yankees, whose game Friday night against the Royals at Kauffman Stadium was postponed by rain and will be played as part of a split doubleheader Saturday. That’s why Aaron Boone says it doesn’t matter who his team is playing, play focused, get the job done each game.

Al Davis had it right.

“Each day presents an opportunity to win a game and at the end of the year there are only so many of those opportunities and that is one thing we talked about as a group in spring training,’’ Brett Gardner told The Post, explaining the mindset behind the Yankees’ success. “And we talk about it from time to time over the course of the season too, just reminding everybody not only of our expectations and our goals and where we want to get to at the end of the year but how we need to get there. Never let up.

“It’s much easier said than done, of course, but we are trying to take things one day at a time, and win every single game because at the end of September they are all going to matter.”

One day, one win at a time.