France striker Alexandre Lacazette marked his first Arsenal start for two months with two goals as they took control of their Europa League quarter-final by demolishing CSKA Moscow in the first leg.
The Gunners scored four first-half goals, Aaron Ramsey’s side-foot finish setting them on their way.
Aleksandr Golovin levelled with a sublime free-kick before Lacazette, who has recovered from a knee injury, made it 2-1 with a penalty after Mesut Ozil was fouled by Georgi Schennikov.
Ramsey produced a brilliant third with an instinctive volleyed flick, with Lacazette adding a fourth after being picked out by the outstanding Ozil.
Arsenal were unable to add to their tally in the second half but they will head to Russia’s capital for the second leg next Thursday with a commanding lead.