#1 Roy Keane
You simply DO NOT mess with Roy Keane. You did not mess with Keane the player; you do not mess with Keane the coach. Be it verbally or be it physically on the field, Roy Keane has a knack of getting the better of most people.
One of the greatest captains of the modern era and one of the best defensive midfielders ever, Keane is also famously remembered for his attitude on the pitch. He had one rule, and that rule was to take zero craps from anyone but his manager.Harsh and straight on interviews and one of the toughest men on the field itself, the former Manchester United midfielder was the single most menacing player in world football for over five years and his rivalry with our no. 2 entry, Patrick Vieira, is the literal stuff of legends.
Keane stood almost half a feet shorter than Vieira but his attitude was one you will not find in any modern day footballer. The current assistant manager of the Ireland team was a one of a kind player and if he disliked someone, he was not shy to hide it. Keane’s fights and playing style both are memorable and as such, his place as the undisputed number one on the list of players you do not want to get on the wrong side of is unquestionable.