The World Cup is not only football's biggest tournament, but it also serves as a shop window for players to impress onlooking clubs.
Manchester United's shocking season is finally over, and their fans can look forward to the summer with excitement. Manager David Moyes was sacked in April after a dismal ten month stint in charge at Old Trafford, and the announcement that Louis van Gaal will be the new manager has supporters looking forward with optimism.
Van Gaal must first complete his duties with the Dutch national team at this summer's World Cup, where he will get to see some of the finest talent around first hand. Some of those players on show could be potential targets for the former Bayern Munich and Barcelona coach, so here are five players in Group H who could be on United's radar.
Saphir Taider, Algeria
A huge problem area for the Red Devils is in central midfield, where the club has failed to replace the legendary Paul Scholes. A target for them last summer was Bologna's Taider, but he chose to sign for Inter Milan instead. Since then, the youngster has fallen out of favour and with first team opportunities dwindling, United could land themselves a bargain by targeting the Algerian again.
Jan Vertonghen, Belgium
Having allowed Nemanja Vidic and Rio Ferdinand to leave the club after their contracts expired, van Gaal must bring in another centre back this summer. With strong links to Ajax, van Gaal could be familiar with Spurs defender Vertonghen, who made his name with the Dutch club. He wasn't his usual self this season, but Vertonghen is still an impressive defender who can also fill in at left back.
Axel Witsel, Belgium
Former Benfica star Witsel is currently with Zenit St. Petersburg, but big European sides are still watching him with intent having been consistently excellent for both club and country. If United do move for Witsel, fans would have to hope that he'd fare better than compatriot Marouane Fellaini has.
Romelu Lukaku, Belgium
With Javier Hernandez looking to leave Old Trafford, van Gaal may also look to bring in another striker - and Chelsea's Lukaku should be on the radar. The Blues may not be too keen on selling another player to the Red Devils after allowing Juan Mata to sign for them in January, but Lukaku is seemingly unfancied by manager Jose Mourinho, and United could land him for around £20m.
Heung-Min Son, South Korea
Another target for the club last summer was Korean forward Son, who had starred for Hamburg in Germany. He chose to move on to fellow Bundesliga side Bayer Leverkusen, and he has continued to impress - which could trigger United's interest again. Son needs to be on form if South Korea are to get out of Group H, as he is their star player and most potent attacking outlet.