Quiz question: who is the only player Sir Alex Ferguson signed twice in his 27 years as manager of Manchester United?
In case you don't already have an inkling, it was not some trophy-laden megastar plucked and then recovered from one of the powerhouses of European football.
Rather it was a player who turned up three hours late for his first training session on rejoining the club he briefly represented as a teenager. A player who was branded 'overweight' and a 'terrible professional' by Fergie, but nonetheless went on to claim a Premier League winners' medal in his first season back at the club.