City entered the dead-rubber fixture having already qualified for the last 16 as group winners, and manager Pep Guardiola decided to make nine changes to his starting lineup.
The notable inclusion in the first XI was academy graduate Micah Hamilton, who was handed his senior debut and marked the special occasion by scoring the opening goal in the 19th minute, firing a powerful strike from a tight angle over Red Star goalkeeper Omri Glazer.
On a memorable night for City's academy, man-of-the-match Oscar Bobb doubled the visitors' advantage with his first senior goal just after the hour mark, driving at the Red Star backline before curling a left-footed shot into the bottom corner.
Hwang In-beom pulled one back for Red Star before Hamilton earned City a penalty in the 84th minute, allowing Kalvin Phillips — making a rare first-team appearance amid uncertainty about his future — to step up and slot home his first goal for the club to increase the visitors' lead.
Red Star scored again in stoppage time when Aleksandar Katai thumped a close-range header past Stefan Ortega, but City held on to preserve their 100% record in Group G, becoming just the second English club after Liverpool (2021-22) to win all six group-stage games in a single Champions League campaign.
The 3-2 victory also helped Man City become the first English club in European Cup/Champions League history to win eight successive matches in the competition.
Premier League rivals Liverpool notched up seven wins in a row between September 2021 and February 2022, while Manchester United (1966), Leeds United
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