Managers and coaches are often the most under-appreciated components of a football team.
If their side wins, it's normally all about the players - but if they lose, the blame falls at the door of the manager's office.
In the event of a club crisis, the boss is usually axed first. But if a trophy is won, they will rarely be seen at the centre of the celebration photos.
Without a strong coach, success is almost impossible and that's why legacies are often made quickly by the best managers.
History has given us some legendary names - the likes of Sir Alex Ferguson and Johan Cruyff spring to mind.
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While some of the current crop including Pep Guardiola, Jose Mourinho and Jurgen Klopp, will all be well celebrated once they retire too.
Ahead of the international break, France Football have released a list of the 50 greatest managers of all-time - and all of the names above feature on it.
However none of them - not even Ferguson or Cruyff, have been named as the best in history.
Instead, the honour goes to the late Rinus Michels, a legendary Dutchman who's managerial career spanned an impressive 32 years.
He took charge of teams across the world, starting in Europe with Ajax, where he spent the entirety of his playing career, before moving to Barcelona, FC Koln and the Los Angeles Aztecs.
Michels also took charge of the Netherlands national team multiple times. At club and international level, the only major honour that alluded him was the World Cup.
He's certainly deserving of the top spot and fought off tough competition to be named the greatest manager of all time.
Sir Alex came in at number two, while Italian tactician Arrigo Sacchi is third, one place ahead of Cruyff.
Check out the full list below.
There are a number of other interesting things to see - Guardiola, who's far from finished in the game, is already fifth, while Leeds United boss Marcelo Bielsa is number 48 on the list.
Not bad for a man who manages in England's second division. It's also strange to see Klopp as low as 27, but he's got plenty of time to climb the list before stepping away from the game.
Do you agree with France Football's list of the top 50 managers of all time? Have your say in the comments below.