Lookman scored twice inside the opening half an hour in Dublin and, for once, there was no response from Leverkusen. They toiled in the second-half, Atalanta always comfortable in their lead, and with 15 minutes an uphill task became a mountainous one, as Lookman rifled a finish into the top corner to claim the match ball and see off Leverkusen, who were beaten for the first time this season in any competition to end their 51-match streak.