Brandon Nimmo dropped down to one knee to lift up the Mets. The left fielder’s seventh-inning RBI single proved to be the game-winner in Saturday’s 6-3 victory over the first-place Phillies at Citi Field, helping the Mets maintain a two-game lead over the Braves in the National League Wild Card race. With the score tied 2-2, Nimmo reached across the strike zone and poked a low-and-outside sweeper from reliever Orion Kerkering into left field. The inside-out swing took Nimmo’s left knee to the ground, but he still got enough on it to drive in Starling Marte from second base for the go-ahead run. “I’ve been here for a while now,” said Nimmo, who is in his ninth season with the Mets. “I want to see winning baseball. I want to see [the] playoffs. I want it for these guys. They’ve been fighting so hard to get into this position. Just a culmination of where we’re at — in my career, in the season — and it was a big moment to come up in.” The clutch hit capped an eventful seventh inning for Nimmo, who robbed Phillies star Bryce Harper of an extra-base hit with a leaping catch against the wall in the top of the frame. Nimmo’s one-out RBI kicked off a three-run seventh inning for the Mets, which Francisco Alvarez punctuated with a two-out, two-run double. The Braves won, 6-2, in Miami on Saturday, keeping them two games behind the Mets for the third and final NL Wild Card spot. The Mets and Braves are set to face each other in a potentially pivotal three-game series in Atlanta beginning Tuesday. The Mets continue to find ways to win without Francisco Lindor, who missed his sixth consecutive game Saturday with lower-back discomfort. The Mets are 5-1 in those games, with the lone loss being Friday night’s 12-2 blowout by the Phillies. Lindor is expected to miss Sunday’s game as well, with Tuesday being “probably the earliest” the star shortstop would return, manager Carlos Mendoza said. “There are a lot of teams out there that are going through it, missing players, and you’ve got to continue to find a way,” Mendoza said. “There’s a lot of talent in that room. Yeah, we lost a guy that is in the MVP conversation. He’s the shortstop, the leadoff guy, but hey, we’ve got to keep going.” Helping to fill Lindor’s void has been rookie phenom Luisangel Acuña, who hit another home run in Saturday’s victory. Acuña’s second-inning solo shot gave the 22-year-old shortstop three homers in eight career games. Acuña — the younger brother of Braves star Ronald Acuña Jr. — went 2-for-3 with a walk Saturday and is now hitting .385 with a 1.292 OPS since making his MLB debut last weekend. “He told me that he’s more excited for me than I think I am for myself,” Acuña said of his brother, the reigning NL MVP who is out for the season with a torn ACL. “Every single time I do something, he always reaches out to me, and the days that I don’t do something, he says, ‘Don’t worry, tomorrow you’ll hit three.’” The hitting heroics of Nimmo, Alvarez and Acuña came in support of starter Sean Manaea, who continues to establish himself as the Mets’ ace. The left-hander limited the Phillies to three runs over seven-plus innings. He has now pitched seven innings in seven of his last 11 starts and boasts a 2.63 ERA over that stretch. The Mets have won Manaea’s last eight starts. “We’ve just got to keep [going] day by day, game by game,” Manaea said. “We’re in this position. We’ve been grinding the whole year, and it doesn’t really make a difference what city we’re in or who we’re playing. We can only control the things that we can.” A sold-out crowd of 44,152 also watched Alvarez hit a solo home run in the second inning; Jose Iglesias extend his hitting streak to 15 games; and Pete Alonso add a bloop RBI single in the eighth. Edwin Diaz nailed down a four-out save to clinch the victory. The Mets will look to win their four-game series against the Phillies on Sunday night in their final home game of the regular season.