It is still something of a surprise that a manager as disciplined as Jose Mourinho would authorise a world-record transfer fee on a free spirit like Paul Pogba.
Mourinho's forte is simplifying the game, having square pegs in square holes. But Pogba is an all-rounder difficult to pin down. You couldn't classify him as a holding midfield player like Claude Makelele or a creative No10.
Yes, he'd have potential as a box-to-box midfielder but his goalscoring ratio – 15-goals-a-season – doesn't make him a Frank Lampard, let alone the most expensive player on the planet.
Finding a system in which Pogba justifies his £100million price tag plus £290,000-a-week wages will be the greatest challenge of Mourinho's career.