Behind every world powerhouse is a great manager.
Managers don't always receive as much attention as their players but that doesn't make them any less important.
From selection to tactics to substitutions, managers have to take risks and have the final say in make or break decisions.
When they fail, managers are the first to get blamed and when they succeed, they are the last to get the credit.
In no particular oder, these are the managers who can get the most out of their teams in next month's World Cup.
Since taking over in 2006, Bradley has taken the USA to unprecedented heights.
In 2009 he took USA to the FIFA Confederation Cup final beating the then world No. 1 team Spain, in the semifinal. Spain had been unbeaten in 35 consecutive matches.
In the final, USA led Brazil 2-0 at halftime before eventually losing 3-2.
Bradley then led USA to the top of their World Cup qualifying group and on to South Africa.
A manager keen on defense and motivation, he is often criticized for playing "boring" football. The thing is, he gets results.
Expect USA to cause some problems in this year's World Cup.
Carlos Queiroz served under Sir Alex Ferguson at Manchester United and has a wealth of experience.
A gifted coach, he has been accused of lacking leadership qualities.
Portugal had a hard time qualifying for the World Cup. Now they are in the tournament, they have been drawn in the "group of death".
Queiroz must use his experience to prove that he has what it takes to lead his team to success.
An Algerian legend, Rabah Saâdane is in his fifth spell as manager of Algeria.
He has guided Algeria to an all-time high ranking at No. 26 in the FIFA rankings. This is down to him navigating Algeria through a very difficult qualification.
He oversaw a massive upset by defeating the Ivory Coast in the 2010 African Cup of Nations-eventually guiding Algeria to a fourth place finish.
He's experienced and an excellent players coach.
Saâdane will be looking to cause an upset to get through a tough qualifying group in Algeria's first World Cup in 20 years.
Sven is managing his third international football team and is at the World Cup for a third time.
He was appointed manager of the Ivory Coast in March 2010 after an unsuccessful spell as Mexico's manager and a short run as Notts County Director of Football.
Cautious, experienced and commanding of loyalty, Sven has proved himself at soccer's top level.
In the Ivory Coast he has a strong team and Sven will look to improve on three consecutive quarterfinal exits in major tournaments.
The World Cup winning manager from 2006 came out of retirement after a poor Euro showing in 2008.
A believer in a tight knit team, he doesn't necessarily select the best individuals. He picks the best team.
Italy qualified top of their group with ease and with Lippi steering them, the world's No. 5 team can achieve a lot.
A Brazilian legend, Dunga took over as manager in 2006 despite having no experience as a professional coach.
He has justified his appointment with a string of impressive results topping their World Cup qualifying group.
Dunga hasn't just slected players from Europe's largest clubs. However, he has been more open minded, selecting players from all over.
Having guided Brazil back to the top of the FIFA rankings, Dunga will be hoping to use his World Cup experience to guide Brazil to yet more World Cup success.
They don't come much more experienced than Carlos Alberto Parreira.
With five World Cup tournaments under his belt, including two with Brazil mean that Parreira knows what he's doing.
In his previous spell with South Africa he built up confidence and he will look to do the same.
A defensive coach, he was mocked for playing two defence midfielders in 1994, despite winning the World Cup.
South Africa will certainly need a solid defense if they're to progress from a tough group. With Parreira, they have as good a chance as they could ever have.
The 63-year-old Italian England manager has won titles with every team he's ever coached.
This has to bode well for an England team searching for their first World Cup triumph in 44 years.
A tactical genius with bucket loads of experience, Capello tends to base his sides with a strong defense.
A stickler for discipline, his desire to win makes him one of the sport's best.
Vicente del Bosque inherited a very good team from Luis Aragonés. He has taken full advantage of this and maintained a very strong team.
He led Spain to an undefeated qualifying campaign, winning a record first 13 matches while in charge.
Del Bosque hasn't been content to stick with what has worked so far. He has handed five players their first caps and selected three uncapped players in his World Cup squad.
Del Bosque's sides are ranked No. 2 in the world. That isn't nearly enough for Bosque.
He'll be chasing a first World Cup triumph for Spain
Joachim Löw took over from Jürgen Klinsmann as manager of Germany in 2006.
He then took Germany to the Euro 2008 final before losing out to Spain.
A renowned tactician, he prepares well and ensures that results are achieved even if the performances aren't the best.
Undefeated in qualifying, Germany is well placed under Löw despite being without Ballack.
The No. 6 team in the FIFA rankings will be looking to improve on successful 2006 and 2008 tournaments. With Löw at the helm, they have a good chance of doing so.