World Cup 2018: Which Liverpool players will go furthest at the World Cup?

5. Marko Grujic (Serbia)

Marko Grujic (center) in action for Serbia

Grujic, who spent the season on loan at Championship side Cardiff, will be hoping to impress in Russia to force his way into manager Jurgen Klopp's plans for next season. Representing Serbia, the 22-year-old will come up against favorites Brazil, Switzerland and Costa Rica.

Serbia impressed in World Cup qualification, topping their group ahead of the likes of Ireland, Wales, and Austria. Grujic will face a tough battle for a place in midfield against the likes of Nemanja Matic (Manchester United), and Luka Milivojevic (Crystal Palace).

On paper, it looks like Brazil will win the group with the other three battling it out for second place. Should Serbia make it through though, they could come up against the winners of Group F likely to be Germany. Marko's chances of progression look bleak.