Danny Welbeck scored his first professional hat-trick as 10-man Arsenal swept aside Galatasaray in the Champions League.
The England striker, excellent throughout, stabbed in a first-half opener before sidefooting in a second.
Alexis Sanchez then curled home before Welbeck clipped in his third.
Burak Yilmaz scored a penalty after Arsenal goalkeeper Wojciech Szczesny was sent off for a foul, but it was to be nothing more than a consolation.
The win was Arsenal first in this year’s Champions League and means they have three points in Group D.
Meanwhile, Liverpool’s hopes of making the Champions League knock-out stages were dented as they succumbed to a 1-0 Group B defeat away to Basel.
Raheem Sterling and Mario Balotelli both had goals ruled out for offside, but Liverpool rarely threatened.
Instead the visitors’ defensive problems were exposed as Martin Skrtel headed towards his own goal and Marco Streller swept home the loose ball.
Steven Gerrard came close to a late leveller, but his free-kick was saved.