Old Trafford is cause for 'mixed' emotions as they prepare for the first of four home Premier League matches staged behind closed doors.United host Sheffield United on Wednesday night at Old Trafford for the first time since their uplifting derby win over City 108 days earlier but supporters are forbidden from attending the remaining matches this season due to the coronavirus pandemic.Banners that read '"FOOTBALL IS NOTHING WITHOUT FANS" - Sir Matt Busby', ‘THANK YOU FOR YOUR INCREDIBLE