Manchester United will hope to see more players follow in the footsteps of Kobbie Mainoo and rise up from the academy into the first team. Last season was a difficult one for Manchester United fans. Eighth place in the Premier League just isn’t good enough for United and neither is crashing out in the Champions League group stage. Erik ten Hag managed to cling onto his job by winning the FA Cup, adding a second trophy in as many seasons at Old Trafford. Outside of that FA Cup win, there just wasn’t all that much for United fans to shout about last season. Kobbie Mainoo’s emergence as a first-t…