2) Andreas Cornelius (Cardiff City)
An impressive 18 goals had arrived in just 34 league games during his breakthrough season at FC Copenhagen at the age of 19 and this convinced Cardiff City boss Malky Mackay to take a punt on him. Having arrived in Wales’ capital in June 2013 for a club-record fee of £8m, he managed just eight league appearances before returning to his former club in January (for half the price).