Manchester United legend Gary Neville has said the Red Devils' philosophy of attacking football must never be challenged again by any future managerial appointment after the immediate success of interim coach Ole Gunnar Solskjaer.
The Old Trafford giants sacked Jose Mourinho after a disastrous run of form, with the Portuguese boss setting his team up to play a pragmatic style.
This followed underwhelming spells under former managers David Moyes and Louis van Gaal, who both strayed away from the playing values built by Sir Matt Busby and Sir Alex Ferguson.
Speaking on hispodcastfor Sky Sports, Neville said his former club must learn the harsh lessons of the past five years:
"No one should ever be allowed to enter Manchester United's training ground or Old Trafford ever again to shape their own philosophy.