When Chelsea's hierarchy look back at their transfer dealings over the past decade, one name will almost certainly stand out as the one that got away.
When Romelu Lukaku arrived from Anderlecht in 2011, it was as a supporter of the team, a bonafide member of the Didier Drogba fan club, desperate to secure success.
Just a year prior to his arrival, the Belgian had visited Stamford Bridge on a school trip, with a YouTube video of him looking around the stadium still widely viewed today.
'Give me a ball and I will be playing here for five hours,' he says.