The Argentine team is very confident this time. All of them have a very good understanding. Coach Scaloni has taught the team well how to win the match. Everyone in the team will want to do well in this World Cup, at least for Messi.
Every giant country is confident: Brazil, Spain, France, Germany, etc, Argentina isn't the only confident team, and they aren't going to win the tournament with their confidence only. Argentina are contenders for the World Cup, but they are not top favorites in my opinion. There is Messi who is probably playing in his last World cup tournament, and if it is up to his teammates, they will want to win it for him, but that desire alone doesn't win tournaments. I feel this year may be Brazil's turn to win the world cup once again, they have a scary attack, and a very balanced team, and there is Neymar who is very hungry this year, i will be happy if he wins it.
Before start of this event every country is favorite, and every team is confident about their win in this world cup, but things could be clear after the start of this event because right now nothing is clear even in last few weeks we have few players those are having serious injuries and most chances they will be not available for world cup is also having their own consequences for these teams, but still few teams are really doing good job and well-prepared for this world cup with their skilled players and current performance which is giving good impression Brazil, Argentina, France and England are currently in limelight for the win because hype is going around them
but few other teams like Germany, Netherlands and Croatia are also in good shape and can go for this as well.