Legendary former Manchester United manager Sir Alex Ferguson showed incredible trust in two influential figures by “never” interfering in their work at Old Trafford. That is according to Manchester United legend Gary Neville, who opened up about the impact that Sir Alex Ferguson had during his time at Old Trafford. Ferguson is widely considered one of, if not, the best managers of all time after his impact in Scotland with Aberdeen and in England with United. The 82-year-old Scotsman bowed out of Old Trafford for the final time as a manager in 2013 after leading United to their last Premier Le…