Real Madrid fought back twice to see off Manchester City in stoppages, Malaga thrashed Zenit and Milan heroes were on target for PSG.
Zlatan Ibrahimovic and Thiago Silva were both on target in Paris Saint-Germain’s 4-1 victory over Dynamo Kiev in Group A.
PSG lead with Porto, who conquered Dinamo Zagreb 2-0 in Croatia.
Group B was all away victories for Arsenal and Schalke 04, while Malaga hammered Luciano Spalletti’s Zenit to top Milan’s Group C (click here for a match report ).
Real Madrid twice fought back at home to beat Manchester City in a five-goal thriller (click here for a match report ) and Borussia Dortmund squeezed a late goal past Ajax.
Think you know your Italian football? Share your knowledge, tips and comments to win cash prizes in OLBG's World Cup tipster competition  - £10,000 to be won!