Mikel Arteta believes Eddie Nketiah is seizing his moment, having hit a brace in Arsenal’s FA Cup third-round win at Oxford United.The 23-year-old has now scored five goals in as many games as he continues to deputise for Gabriel Jesus after the Brazil forward suffered a knee injury at the World Cup.Nketiah struck twice in the 3-0 victory at the Kassam Stadium, two smart finishes adding the gloss to a difficult game following Mohamed Elneny’s opener.