Monaco marked their return to the UEFA Champions League with a statement 2-1 win over Barcelona while Leverkusen impressed as they scored four at Feyenoord to get their campaign off to a stunning start. Meanwhile, a superb David Raya double save from Mateo Retegui's penalty ensured the game between Atalanta and Arsenal finished goalless. Benfica and Atlético de Madrid both secured 2-1 wins, while Brest also clinched victory against Sturm Graz in their very first European game. We hear from Arsenal goalkeeper David Raya, Atalanta star Charles de Ketelaere, Barcelona boss Hansi Flick, Leverkusen wing-back Jeremie Frimpong and his head coach Xabi Alonso, as well as Feyenoord coach Brian Priske.