Getty ImagesThe 2018 FIFA World Cup in Russia kicks off in three months' time and will likely be one of the most-watched sports competition on the planet. France, Brazil, and Argentina are among the favourites to win the tournament with players like Antoine Griezmann, Neymar, and Lionel Messi expected to excel. But those nations are far from reliant on just one player and it takes a team effort for a single country to lift the World Cup trophy when the competition finishes on July 15. For that reason, we've collected a list of one player you really need to know from every nation in the tournament.Argentina — Nicolás Otamendi. Getty Images Position: Defender. International appearances: 51 (3 goals). We're well aware one of the best players on the planet, Lionel Messi, plays for Argentina.