#4 Ander Herrera (Manchester United)
Ander Herrera, is a highly technical player who possesses special qualities that make him a value addition in big matches. He is often referred to as 'the man who kept Hazard in his pocket'.
Ander Herrera had a fantastic 2016-17 season and rightfully received the 'Sir Matt Busby Player of the Year' award for being the Best Manchester United player.
Despite this, the Spaniard had a stop-start season in 2017-18 as he was second choice behind the likes of Nemanja Matic, Paul Pogba and Jesse Lingard and he was also pushed behind Scott McTominay for a while. With Carrick's retirement, United might look to sign another mid-fielder and this could push Herrera further back.
This has led to doubts in Herrera's mind and he might decide to make a move back to his native Spain, and this might tempt Barcelona to get in a Spanish player into their squad.
Herrera could provide energy to a Barcelona mid-field that is lacking the dynamism and energy. If he is used as a player off the bench, he will most certainly add quality and value, something that was missing off Barca's bench this season.
Herrera is a versatile player, capable of playing in Sergio Busquets' position or even further forward as a left central midfielder like Iniesta. It would be ideal to replace Iniesta with a Spaniard, but does the man himself want a move to Camp Nou?