Defending champion Serbia didn't qualify for the 2017 Men's U-20 World Cup, so we are guaranteed a new title-holder for this edition. The last five tournaments have yielded five different winners, and two of those were first-time champions (Ghana in 2009 and France in 2013; three, if you count Serbia as a first-timer since it was Yugoslavia that won the 1987 tournament, not an independent Serbian team). But Argentina has won six of the 20 editions of the U-20 World Cup - and it has qualified for a crack at a seventh title in 2017. Two-time winner Portugal is in the competition too, and Germany (1981 champ) and France (2013 winner).