Mario Balotelli once snubbed a meeting with his then-Inter Milan boss Jose Mourinho to go to the Formula One instead.
Mourinho branded Balotelli 'unmanageable' after working with the Italy international at Inter Milan, and gave an example of the sort of unprofessionalism that has made Balotelli the bane of managers in two countries.
Speaking to BT Sport, Mourinho said: "I told him to be in my office at 2pm for a meeting. He was not there. When I called him he went to the Formula One qualification race on a Saturday for the race on Sunday.
"I told him: 'Mario I told you that you have to come to my office at two o'clock!'
"He told me: 'Meetings in your office I can have every day but to see the Formula One it's only once a year in Italy.
Article continues below
"In the moment it is difficult to accept because you are speaking about top professional football. But a kid of 18, 19 to have one of these naive reactions."
Mourinho managed Balotelli for three years between 2008 and 2010 at the San Siro, a period which saw a then-teenage Balotelli feature in the first-team after stepping up in 2007 and he made a big impact.
I told him to be in my office at 2pm for a meeting. He was not there. - Jose Mourinho on Mario Balotelli
He scored 20 goals in 59 Serie A appearances before moving to Manchester City. He had his ups and downs there too, becoming something of a cult figure as City won their first Premier League title, before an ill-fated return to Milan, this time AC Milan, and subsequent move to Liverpool last summer.
Liverpool & BT Sport
He hasn't exactly hit the ground running at Anfield either, with some prominent figures now calling for Brendan Rodgers to cut his losses already.
Mourinho was speaking to Clare Balding for BT Sport, in a one-on-one interview that will be broadcast on Christmas Day.