Liverpool and Inter both won in added time, while Lionel Messi opened his campaign with a hat-trick.
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Messi scores hat-trick in 4-0 victory for Barcelona
Liverpool win in added time after Paris comeback
Inter score two late goals to beat Tottenham
Also wins for Atlético, Dortmund and Galatasaray
Next games in these groups are on 3 October
GROUP A
Monaco 1-2 Atlético Madrid
Club Brugge 0-1 Dortmund
GROUP B
Inter 2-1 Tottenham
Barcelona 4-0 PSV
GROUP C
Liverpool 3-2 Paris
Crvena Zvezda 0-0 Napoli
GROUP D
Schalke 1-1 Porto
Galatasaray 3-0 Lokomotiv Moskva
Wednesday’s matches (21:00CET unless stated)
Group E: Ajax v AEK Athens (18.55), Benfica v Bayern München
Group F: Shakhtar Donetsk v Hoffenheim (18.55), Manchester City v Lyon
Group G: Viktoria Plzeň v CSKA Moskva, Real Madrid v Roma
Group H: Valencia v Juventus, Young Boys v Manchester United