Nicolas Kuhn scored twice and Luis Palma grabbed the winner in the 68th minute to give Celtic a 4-3 victory over Manchester City in a pre-season game on Tuesday.
Norway's Erling Haaland, wearing the City captain's armband for the first time, headed home a 57th-minute equalizer only for Honduras international Palma to score the winning goal in a breakaway at the University of North Carolina's Kenan Memorial Stadium.
The match was a fine-tune ahead of next month's start of the 2024-25 campaigns for Celtic, winners of the last three Scottish Premier League crowns, and four-time defending English Premier League champions Manchester City, who began a US tour.
With several top stars rested from the European Championship, City boss Pep Guardiola used the opportunity to analyze younger talent.
The match marked a Celtic debut for goalkeeper Kasper Schmeichel, the 37-year-old Dane who began his career with City in 2006. He played the first half for the Hoops.
German right-winger Kuhn scored a first-half brace for Celtic, playing in a fourth pre-season game.
Down 3-1 at half-time, City responded seconds into the second half with just-scored 21-year-old Argentine substitute Maximo Perrone's goal, a left-footed shot from the right into the far corner on his first touch of the ball.
Haaland headed home a cross from compatriot Oscar Bobb in the 57th minute to pull City level.
But Celtic scored the winner in the 68th minute when Palma, who had gone on three minutes earlier, finished off a three-man breakaway when the City defender was caught flat-footed near midfield after pressing with the backline.
City substitute Ben Knight was denied an equalizer in the 76th minute when Celtic goalkeeper Viljami Sinisalo of Finland smashed the ball over the bar in the second half.
Kuhn opened the scoring in the 13th minute, taking a pass on the right flank and charging at City's starting goalkeeper Stefan Ortega, then firing a left-footed shot just inside the far post.
Schmeichel denied Haaland in the 23rd minute with a right save on a left-footed shot from a feed from James McAtee.
In the 31st, Schmeichel again denied Haaland, from the right side on a left-footed shot that Schmeichel deflected with his left hand.
But Man City equalized in the 33rd minute when Haaland flicked the ball down the left to the onrushing Bobb, who fired a shot that deflected off Schmeichel and bounced into the goal.
Kuhn responded for Celtic in the 36th minute, charging in from the right and then pulling the ball back to evade a defender and curling a left-footed shot high into the goal.
Celtic extended their lead to 3-1 in the 44th minute when Kuhn delivered a perfect centering pass to Japan's onrushing Kyogo Furuhashi, who split two defenders, evaded Ortega and fired in a left-footed shot from a steep angle.
Man City's US tour continues on Saturday against AC Milan at New York's Yankee Stadium, with other games next week against Barcelona in Orlando and Chelsea in Columbus, Ohio.
Celtic face Chelsea on Saturday in South Bend, Indiana.
