During a year as a Newcastle midfielder under Rafael Benítez, Mikel Merino struggled to settle in the north-east. He departed for Real Sociedad without offering Tynesiders more than a few glimpses of his best work but, when Merino trotted on as a 70th-minute Arsenal substitute here, Eddie Howe had reason to be fearful.
At that stage Newcastle were leading thanks to Nick Woltemade’s second goal for the club but their manager did not need telling that Mikel Arteta’s reincarnation of Merino as an emergency forward last season proved one of the triumphs of his north London tenure.