PSG began Champions League campaign with a 4-0 win over Atalanta
Marcus Thuram scored twice as Inter Milan beats Ajax 2-0
Real Madrid edged Marseille 2-1, thanks to Kylian Mbappe's brace
Liverpool fought back to defeat Atletico Madrid 3-2 at Anfield
Surprise wins include Qarabag's 3-2 triumph over Benfica in Lisbon