No banner-bearing planes flew over MetLife Stadium, but a dark cloud still hung over the aftermath of a victory.

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Superstar receiver Malik Nabers is feared to have suffered a season-ending torn ACL in his right knee — the major asterisk Sunday souring one of the best performances by the Giants of the past three seasons in a 21-18 upset win against the Chargers.

“Unfortunately this is a business of injury,” head coach Brian Daboll said. “I feel terrible for Malik’s injury. We’ll see where it’s at. He’s an important piece to our team, but … it’s next man up.”

A jovial postgame locker room’s only moments of cold water came at the me

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