Andre Villas-Boas has spoken about the unexpected emotional rigour of arguing about signings with data analysts while at Tottenham.
The Portuguese manager spent 18 months at Spurs between July 2012 and December 2013 and wanted to sign a midfield star he had coached at Porto.
He recalls 'massive, massive arguments' as he wanted to make his compatriot one of his first signings - but the club wagged their fingers and said the player was only sixth on their data-led midfield shortlist.
Spurs pushed ahead with other targets, including Mousa Dembele, and returned for the mystery man at the end of the summer window, missing out on his signature by minutes - despite agreeing a £24million fee for him.