Manchester United fans mocked Erling Haaland’s father, Alf-Inge Haaland on a train, in the wake of their FA Cup win over Manchester City on Saturday. Few gave the Red Devils a chance of winning the trophy prior to the match at Wembley. But goals from Alejandro Garnacho and Kobbie Mainoo gave United victory, with Jeremy Doku’s late consolation not enough for City to force extra-time. It was a frustrating day for Haaland at the tip of Pep Guardiola’s attack, with the Norway international ineffective. Though he hit the bar in the second half, Haaland was shackled by Lisandro Martinez and Raphael …