In July, Nketiah picked up his first major medal of his career as Leeds United were declared winners of the English Championship. The 19 games Nketiah participated in at the start of the season were enough to be eligible for a winners medal. Two weeks later, Nketiah lifted his first major trophy of his career with Arsenal, coming on as a substitute in the 82nd minute in the 2–1 victory over London rivals Chelsea in the FA Cup Final at Wembley Stadium.