Chelsea have paid the price for buying into Romelu Lukaku 's promise that he had matured after the striker's loan move to Inter Milan was confirmed.
Lukaku returned to Stamford Bridge last summer and promised to help fire the Blues to titles, but it proved to be a disaster for all concerned - apart from Inter, who pocketed £97million. The Belgian scored just eight goals in the Premier League as the Blues fell away from an expected title challenge.
That failure to win any trophies saw Lukaku break a promise he made when his return was announced. He first departed Stamford Bridge in 2014 as a 21-year-old, having failed to find regular first-team minutes at the Blues, despite a series of impressive loan spells at other top-flight clubs.