Arsenal booked their place in the semi-finals of the Carabao Cup as Danny Welbeck’s solitary goal settled a tight encounter with West Ham.
Arsenal manager Arsene Wenger, who made 11 changes from the weekend win over Newcastle, saw his side struggle to break down the defensively resolute visitors in the first half.
But England forward Welbeck broke West Ham’s resistance just before the break, turning in Mathieu Debuchy’s header across goal.
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The Gunners’ night was soured when they lost Olivier Giroud to a suspected hamstring injury in the second half, but they remain in the running for a first League Cup win since 1993.
Hammers boss David Moyes also saw a much-changed side fail to click in attack, with the belated introductions of Andy Carroll, Diafra Sakho and Marko Arnautovic failing to undo the home defence.
Neither Joe Hart, restored to the West Ham side for the rested Adrian, nor Arsenal’s second-choice goalkeeper David Ospina were forced into much action in what was a disjointed contest.
