Chelsea moving on Nemanja Matic as part of a deal to sign David Luiz wasn't supposed to work out quite like this.
The Serbian has fulfilled his potential in a way he was unable to do so at Stamford Bridge and is one of the most in-demand midfielders in Europe.
His towering presence and ability to dictate games has attracted the Blues' attention, believed to have made enquiries about buying him back.
Except for them to find one problem, Benfica want €30 million for his services, and it's a fee which Chelsea are not thought to be willing to pursue further.
Which may just force Chelsea to re-consider how they do business in future.
When they signed Oriol Romeu from Barcelona, a buy-back clause was inserted into the Spaniard's contract - giving them first option should the Blues put him up for sale in the future.
The clause is also said to feature a set price, with differing accounts of what that actually may be in existence.
But the point is clear, Chelsea may now look at Matic's predicament and think 'we missed a trick here.'
Chelsea could now look at every exiting young player with suspicion, and look to preserve their own interests by inserting buy-back clauses into their contracts.
They hold the cards with their finances, but it does not make sense to let a player go for small change in football terms and pay a mega-fee two or three years later for his services.
Don't be surprised to see future young players who leave to get first team football have clauses in their contracts similar to Romeu, to save a similar scenario to the Matic situation transpiring.
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