Italian club Como enjoyed a memorable Champions League debut, trouncing RB Leipzig 4-1 at their home ground. Marti Baturina opened the scoring, followed by goals from Taso Douvikas, Assane Diao, and Maximo Perrone, who sealed the victory in stoppage time.
Six-time winners Bayern Munich also started their group phase campaign in dominant fashion, securing a 5-0 thrashing of Norway's Bodo/Glimt. Jamal Musiala broke the deadlock after halftime, with Harry Kane, Alphonso Davies, and Michael Olise adding to the scoreline.
Elsewhere, Fenerbahce marked their return to the Champions League after an 18-year absence with a 1-1 draw against Roma. Bryan Cristante scored for Roma, but Mason Greenwood set up Archie Brown for Fenerbahce's equaliser. PSV Eindhoven also drew 1-1 at home to Shakhtar Donetsk, while ten-man Slavia Prague suffered a 3-2 home defeat to Lens, conceding twice in stoppage time.