Chelsea boss Guus Hiddink has questioned the wisdom of Newcastle United naming Alan Shearer as their stop-gap manager.
Hiddink warned: "Top, top players think because of their talent everything is going to happen automatically.
"It's not always that when you are a top, top player you are guaranteed to be a top manager as well.
"Most of the time the players who have not reached the top, top level can sometimes imagine a little bit more what the difficulties are."
He added: "It depends on your religion whether or not you believe in Messiahs.
"At kick-off he will not play and I will not play. We can prepare as we have done but we both have to sit down. It's not a game between managers. The instant input and change in the dressing room gives the players a lot of energy and that's an extra aspect of the game we have to deal with.
"But besides this game, there are other things for managers to get interested in. How to prepare a team, how to make training sessions with aims and objectives. Training is not just for passing the time or having a nice workout.
"Every day we aim for a strategic, physical or tactical aspect of the game. That's the part where new managers have to broaden their knowledge of the game. I have the benefit of experience."