10. Louis Van Gaal
Despite of the fact that Manchester United are presently the most boring team in the world, Louis Van Gaal is still one of the best managers in the world. He is especially renowned for his substitutions and if he’s making one in a match, you’re sure that he has a reason for it. He is a highly tactical manager and his abilities were proven with many clubs, most recently being the Netherlands National team. He took a bunch of players, with no remarkable talent (except van Persie and Robben) and made the team reach to the finals of the 2010 World Cup. His goalkeeper substitution before a penalty shootout in the FIFA 2014 World Cup will always remain his best decision!