Not many people expected Manchester United to win the FA Cup against Manchester City and Theo Walcott believes Erik ten Hag played a huge role in landing the trophy. The Red Devils turned up on the day and delivered their best performance of the season as they nullified the threat from City and in turn, looked a huge threat on the counter. In the end, goals from Kobbie Mainoo and Alejandro Garnacho proved enough for United to win out. READ MORE: Man United may be very interested in Leeds United’s Red Bull takeover after £30m crisis twistOf course, there has been pressure on Erik ten Hag all se…