Cenk Tosun (Everton)
The Turkish international cost the Toffees £27m when he arrived from Besiktas in the January 2018 transfer window but poor performances and fitness problems have hampered his time at Goodison Park.
Tosun has spent a spell out on loan at Crystal Palace, as well as previous club Besiktas, but, on both occasions, he sustained knee injuries which limited his match time.
