PHOENIX — Shortly after getting knocked around by the Brewers on Friday, Matt Harvey insisted there was no need to adjust his own high standards, even despite his lingering struggles.

But on the eve of Harvey’s next start in Wednesday’s series finale against the Diamondbacks, Mets manager Terry Collins seemed to temper his own expectations.

“You get to a point where you don’t sit here and say I hope I get this or I hope I get that,” Collins said. “You just send him out there and you hope he’s getting back to what Matt Harvey is. That’s what I’m looking for. Improvement. That’s it.”

Harvey (2-3) took the loss in a 7-4 defeat to the Brewers. He allowed five runs on seven hits in just five innings while allowing three homers, which equaled his career high. His ERA rose to 5.63.

Following Harvey’s three-game suspension for his May 6 no-show against the Marlins, the Mets lined up the righthander’s next two starts to shield him from possible blowback at Citi Field.

Harvey made his big-league debut at Chase Field in 2012, tossing 5 1/3 scoreless innings. He is 3-1 with a 3.20 ERA in four lifetime starts against the Diamondbacks.

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Gsellman loses a turn

The Mets will use Thursday’s scheduled off day to skip Robert Gsellman’s next turn in the starting rotation.

Gsellman is 2-3 with a 7.07 ERA in eight games (seven starts) this season. In his last four starts, he has allowed four runs or more three times. For now, he will be used out of the bullpen.

With another off-day on Monday, the Mets won’t need a fifth starter until playing the Pirates in a three-game series on Memorial Day weekend.

Jacob deGrom will start on Friday against the Angels.

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Grandy moved down

Curtis Granderson started in the eighth spot, the lowest he’s hit in a starting lineup since 2011. The outfielder began the day hitting just .148, the second lowest average among all qualified hitters in the big leagues.