#4 Sebastien Haller - West Ham United
Sebastien Haller, alongside Luka Jovic and Ante Rebic, was part of one of the most potent trios in world football last season, as he made a name for himself as a top-class attacker at Eintracht Frankfurt.
Having been courted by some of the biggest clubs in the world, the Frenchman joined West Ham for a fee believed to be in the region of £45 million, a mammoth number considering the stature of the club.
Since making the move to London, Haller started off well but has fizzled off after a run of good form, with his tally of 7 goals in 26 Premier League appearances not enough to keep the Hammers in the top half of the table.
David Moyes' side are in the thick of the relegation battle despite spending heavily in the summer and Haller's inability to score goals and perform consistently has been a problem for them, as they look to avoid dropping down to the Championship.
The 25-year-old's talent is unquestionable but he needs to put his head down and play his heart out for his side in the business end of the season if they are to secure their Premier League status beyond the summer.