Karim Adeyemi dazzled as Borussia Dortmund demolished Celtic, while both Barcelona and Manchester City secured their inaugural wins in the revamped Champions League on Tuesday.Adeyemi bagged a hat trick in the first half, leading Dortmund to a resounding 7-1 victory over Celtic on home turf. This triumph follows Bayern Munich's overwhelming 9-2 conquest over Dinamo Zagreb in their initial matchup.Robert Lewandowski propelled Barcelona into victory as the Spanish behemoth cruised to a 5-0 victory against Switzerland's Young…