Sir Alex Ferguson mastered the art of keeping players' egos in line - and if they ever became too big they'd be ushered to the Old Trafford exit door immediately.
However, the Manchester United icon did occasionally absolutely destroy a player when it may not have necessarily been called for - see, Owen Hargreaves. The former England international was undeniably gifted in a technical sense, but injuries crippled what was a good, but could have been great career.
With that in mind, it is up for debate whether Hargreaves was deserving of the scathing review Ferguson gave him in the Scotsman's second autobiography. He certainly didn't deserve to have the more brutal passages read to him live on television on BT Sport.
