The 34-year-old demanded the best from everyone around him and hated losing during training sessions, the coach has said
Ronald Koeman says Lionel Messi was like "a tyrant" during training at Barcelona.
The Argentina star raised the bar at the Camp Nou club as he developed into one of the greatest to ever play the game before departing to join Paris Saint-Germain this year.
Barca coach Koeman has lifted the lid on the six-time Ballon d'Or winner's conduct during practices with the team, revealing he would get very angry if he did not win games during the sessions.