David Robertson with the bases loaded and no one out trying to protect a narrow lead against the Blue Jays?

The Yankees had seen this before — and it didn’t go well.

Unlike on April 1, when Robertson gave up a game-altering grand slam to Justin Smoak in Toronto, Robertson performed his usual tight-walk routine and escaped as the Yankees held on to a 4-3 win at the Stadium.

“We worked so hard to get the lead and pitched so well to hold it, I figured I’d better do my part to keep it intact,” Robertson said.

He got Kevin Pillar swinging and after Curtis Granderson’s pinch-hit single got the Blue Jays within a run, fanned Randal Grichuk and then got Luke Maile to fly out to left.

Aroldis Chapman struck out the side in the ninth for his third save, as the bullpen combined to give up just one run in 4 ²/₃ innings in relief of a solid CC Sabathia as the Yankees opened a four-game series with Toronto with a victory.

But it wasn’t without some anxious moments — especially after Robertson gave up a leadoff single and then back-to-back walks.

Still, Aaron Boone believed Robertson could find a way to keep the Yankees ahead.

“He’s the one guy, even if it gets a little sideways for a minute, you always feel like he can rein it right back in,’’ Boone said.

Aaron Judge, who gave the Yankees a 4-2 lead in the seventh with his fifth homer of the season, agreed.

“That’s a situation you never want to be in, but it doesn’t matter for him,’’ Judge said of Robertson. “Whenever it’s a tough situation like that, I want [Robertson] on the mound.”

It was a good night for a bullpen that has been far from dominant.

Sabathia, in his first start since being shelved with a right hip strain, surrendered just two unearned runs before being pulled after 71 pitches for Chad Green in the fifth.

“He gave us what we needed and then the script played out from there,’’ Boone said of Sabathia and the pen.

Green retired all five batters he faced before giving way to Dellin Betances, who was effective for a second straight appearance, tossing a scoreless seventh and gave way to Robertson.

The Yankees, who took an early 2-0 lead with the help of a double by Neil Walker that snapped an 0-for-16 streak, an RBI groundout by the slumping Tyler Wade and a two-out run-scoring single by Ronald Torreyes, went ahead for good again in the fifth on a Didi Gregorius RBI single with two outs before Judge homered in the seventh for what proved to be a much-needed insurance run.

The rest was up to a bullpen that entered the game with a 4.48 ERA.

Green started it off by retiring all five batters he faced and Dellin Betances was strong for a second straight outing before Robertson added some drama to the evening.

“Tonight was a good game for us,” Chapman said through an interpreter. “We went in there and did our job. Yeah, the bullpen hasn’t done what we expect of ourselves, but the good thing is it’s early. We’re confident everybody is gonna be able to do the job.”

Perhaps Thursday’s performance will get them going.

“Those are four dynamic guys that came in there and did their job,” Boone said. “I’m excited to see it roll out like that.”

If that keeps up, Judge doesn’t expect the 9-8 Yankees to stay stagnant for much longer.

“You don’t want to be around .500,’’ Judge said. “But it’s still April 19. It’s still early. We have a lot of work to do. … We’ll look up maybe in August, September, if we continue to work on the little things, we’ll be where we want to be.”