I interviewed Mark a couple of years back - when he was at the SFA - and he said to me then his one big regret was not being able to complete a deal for Eriksen (who was 16).
Shame, but I'm sure every club has stories like this.
Just yesterday I was listening to the Peterborough owner saying they had Jamie Vardy (then of Fleetwood) in a restaurant with Darren Ferguson finalising a transfer, then Leicester came in and Vardy had no interest. Suppose it happens to everyone from time to time, in different ways.