LONDON, Oct 22 — Viktor Gyokeres scored twice to end a nine-game goal drought in Arsenal’s second half demolition of Atletico Madrid as a 4-0 win extended the Gunners’ perfect Champions League start on Tuesday.

Gabriel Magalhaes and Gabriel Martinelli opened the floodgates before Gyokeres’ double, with all the goals coming in a 13-minute spell either side of the hour mark.