Sir Alex Ferguson believes he only ever worked with four world-class players during his 26-year reign as Manchester United boss.
The Scot revealed in his new book “Leading” published on Tuesday that he considered Eric Cantona, Ryan Giggs, Paul Scholes and Cristiano Ronaldo as true legends of the game.
“They made the difference and the evidence is there,” he said.
“When we brought [Cantona] in we won the league that season – it was his mere presence and his ability to make and score goals.
“The younger breed like Ryan and Scholes were just fantastic players and the thing about those two was longevity.
“Are there players who have played right through the whole of the Premier League and performed at the level they have? There are none, absolutely none.
“Of course Ronaldo was just a complete genius of a player.”
Ferguson rated other players such as Wayne Rooney, Carlos Tevez, David Beckham, Peter Schmeichel and Rio Ferdinand as “great players” but “the others elevated themselves above that.”
Ferguson won the Premier League 13 times, the FA Cup five times and the Champions League twice with Manchester United before announcing his retirement in 2013.