Como enjoyed a dream Champions League debut Thursday as the Italian club trounced RB Leipzig 4-1 at home, but fellow new boys Sabah were crushed 4-0 at Manchester United.
Six-time winners Bayern Munich opened their group phase campaign with a 5-0 thrashing of Norway's Bodo/Glimt while Fenerbahçe made their long-awaited return to the competition with a 1-1 draw at home with AS Roma.
Como's first-ever qualification to Europe's elite club competition meant a race against time to get their lakeside Stadio Sinigaglia home upgraded to meet UEFA guidelines.
Failure to do so would have meant playing their home games 200km away at the home of Sassuolo, but Cesc Fabregas's side were spared that and celebrated in style.
Marti Baturina got the party started with a 15th-minute opener before Taso Douvikas doubled their lead.
