There are myriad reasons why Newcastle United paid French club Nice just £16million for Allan Saint-Maximin last summer.
Here was an enfant terrible, a talented maverick who was expelled from the illustrious Clairefontaine academy aged 12 and whose social-media posts included drinking in a nightclub after his team had lost, as well as ill-advised pictures of his bank account.
There were accusations of feigning illness to miss a game, a car crash involving a tram - after which it was reported he produced a fake driving license - and questions over his attitude.
Nice boss Patrick Vieira said of him: 'Allan's problem is that sadly he thinks that talent is enough to go to the highest level.