Manchester City's treble winners have added more silverware to their collection, but a UEFA Super Cup victory over Sevilla only exposed some cracks in Pep Guardiola's squad ahead of another demanding campaign. Sevilla had begun their campaign last weekend with a disappointing 2-1 home defeat to Valencia and finished 12th in La Liga last season. But the Europa League winners should have picked up another European trophy in Athens. Youssef En-Nesyri's header powered the Spaniards into a first-half lead, but the Moroccan was guilty of missing two huge chances when one-on-one with Ederson after the break.