9. Oscar | Chelsea

Oscar is now a key player for both Chelsea and the Brazilian national team - and he will only get better over the forthcoming years.

Still only 22, some might think it's a little premature to label Oscar "world-class". However, Chelsea signed him for almost £20m in July 2012, so how much would he be worth today?

The South American is already one of the Premier League's best playmakers.

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