The former Red Devils captain predicts his old club won't be ready to challenge for the Premier League title until 2021-22 season
Gary Neville has insisted patience is the key for Manchester United after more stinging criticism in the wake of their shock defeat to Crystal Palace.
United suffered a surprise 2-1 home loss to Palace at the weekend, having started the new season with a home victory over Chelsea and draw at Wolves.
Neville's former club have endured a tumultuous period since Sir Alex Ferguson retired in 2013 - the year of their last title - going through managers and big-money signings in the search for a winning formula.