The Yankees will host their first playoff game in nearly three years when they open the ALDS on Tuesday against the Guardians, but Cleveland already has an idea of what kind of environment they’ll be dealing with thanks to an ugly display the last time they visited in April.

That’s when fans in the right-field bleachers threw garbage and debris at Guardians players following a walk-off win by the Yankees on April 23.

The scene came after Cleveland outfielder Steven Kwan was injured crashing into the wall in left field earlier in that ninth inning and teammate Myles Straw climbed part of the fence to confront a fan.

Gleyber Torres then won the game and fans in right started throwing objects at the Guardians in the outfield, leading the Yankees — including Aaron Judge and Giancarlo Stanton — to cut short their celebration and calm down the situation.

Afterwards, Straw called the incident, “Brutal. Worst fan base on the planet.”

“That wasn’t ideal,” Stanton said Sunday of the incident. “But, still, it’s part of the thought process of what they have to go through to get through us.”

The intensity will be just as high on Tuesday and the Yankees will have their typical increased security at the Stadium for a postseason game.

“This place is wild already, but once the playoffs start, right when the anthem is over, it’s the best environment in baseball, for sure,’’ Stanton said. “I’m excited for that.”

Whether it has an impact on the Guardians — the youngest team in the majors with one of the smallest payrolls that significantly exceeded expectations — remains to be seen.

Stanton noted it’s helped the Yankees in the past.

“The intimidation factor,’’ Stanton said. “It’s no easy task for a road team to come in and be comfortable. That’s the idea. You don’t want them to be comfortable or get any momentum. [The fans] make it so tough to come back when they get down.”

Cleveland beat Tampa Bay in the wild-card round to get to the ALDS and finished the regular season on a 24-6 run to win the AL Central easily.

“We know how good they are,’’ general manager Brian Cashman said of the Terry Francona-led Guardians. “They’re young, they’re athletic and they’re run by one of the game’s all-time great managers… We know we’ve got our hands full.”

Aaron Boone added he’s seen Cleveland “playing with a lot of confidence.”

“It’s a young group that has played well in meaningful situations,’’ Boone said. “It’s the playoffs. It’s going to be hard, it’s going to be a challenge.”

Stanton, though, likes the Yankees’ chances after they swept Cleveland in The Bronx and won five of six meetings overall this year.

“I think we match up well against them,’’ Stanton said. “We’ve got to put it to them.”