New signing Kieran Tierney, signed from Celtic for 25m pounds, delivered some threatening crosses. One of which led to  Martinelli’s opener, darting across his marker at the near post and glancing a superb header high into the net after Shkodran Mustafi’s crossfield pass had found its way to Tierney.

Arsenal’s next two goals came from the same area. For their second, Martinelli beat Standard Liege defender Zinho Vanheusden to a Reiss Nelson cut-back and controlled the ball smartly before shifting it onto his right foot and curling a low finish beyond the goalkeeper.

Willock volleyed another Tierney cross over the bar from close range soon after that, but the academy graduate did not have to wait long to add Arsenal’s third, controlling Nelson’s deflected shot and dispatching a composed finish into the corner for his third goal of the campaign.

Arsenal were unfortunate not to be awarded a penalty when Standard Liege goalkeeper Vanja Milinkovic-Savic brought down Nelson shortly before half-time, but they were celebrating their fourth just 12 minutes after the break when Martinelli’s delicate centre was forced home by Ceballos.

Credits: SkySports