Playing at the World Cup is a dream for all footballers. And why not, it's about representing your country at the most watched extravaganza after the Olympics with over 3 billion watching it worldwide!The worst thing that could happen to a footballer is an injury. And if he/she gets injured right before a big tournament, it's even worse.Here are 3 amazing footballers who are set to miss the World Cup because of an injury:#4 Dani AlvesBrazil v Argentina - 2018 FIFA World Cup Russia QualifierBrazil have been handed a huge blow as Dani Alves has been ruled out of the World Cup. The right-back was injured during Paris Saint-Germain's Coupe de France final vs Les Herbiers.Alves has suffered a knee ligament injury according to reports and that could result in him missing up to 8-9 months of football. PSG will also be sweating on this as they will need to sign a replacement this summer.Fagner, Danilo and Rafinha are expected to be his possible replacements in the Brazil squad. Marcos Rocha and Mariano are also good options but Tite is not a big fan of the two.