#3 Moise Kean | Everton (on loan at Juventus)
Despite emerging in Italy as one of the biggest prospects in European football, the youngster has had consecutive sub-par seasons. Unable to flourish properly at Juventus, where he graduated from the academy, the star was sold to Everton.
However, life with the Toffees proved difficult, with Everton eventually loaning Kean back to Juventus this season. His loan spell to PSG may have been impressive during the previous campaign but the star has stalled again.
In 29 appearances for the Bianconeri, Moise Kean has managed just five goals. This is a woeful return from a player who scored seven goals in 17 appearances for the same club when he was a teenager.
The higher-ups at Juventus will not be happy with Kean, especially because they brought the star in on a two-year loan deal. Reports have emerged that there is no break clause in the star's contract even though it was believed that Kean would return to England.
#2 Anthony Martial | Manchester United (on loan at Sevilla)
Anthony Martial leaving Manchester United to go on loan to Sevilla would have been deemed impossible when the star moved to Old Trafford in 2015. However, since he joined the Red Devils, Martial has struggled to find consistent form, enjoying only one season with more than 20 goals.
Last season, the star had just seven goals in 36 games, his worst output for the club. After managing to score just one goal in 11 games for the Red Devils this season, the star decided to leave on loan to pursue more game time.
His move to Sevilla was heralded as a potential change of fortunes, yet the Frenchman has faltered once more. Since his arrival, the 26-year-old has scored just once in eight appearances, and he has recently faced criticism from Sevilla supporters.
Reports have stated that he is unhappy with the situation at the Spanish club. Sevilla are also unhappy about spending money on a star who has not performed.
#1 Saul Niguez | Atletico Madrid (on loan at Chelsea)
If Saul Niguez remains at Chelsea after the end of the season, it won't be because of sublime performances but out of necessity. The Blues have not been keen to hold onto the Atletico Madrid star, especially because his performances have left many fans frustrated and unhappy.
However, current sanctions on club owner Roman Abramovich will keep the club from partaking in the transfer market. This means that the London club will need to keep all the players they have.
It won't be an easy feat either, as Chelsea are reportedly seeking a better understanding of the sanctions to see if they can sign Saul Niguez for another season.
The Blues have been unable to renew contracts of some key players, which will see Stamford Bridge lose a good number of key defenders. Saul Niguez may have been a poor fit at the club, playing just eight Premier League games so far. However, they will require all hands on deck due to the sanctions in place.