16. Benfica


Chelsea have contributed significantly to the transfer fee income of Benfica over recent seasons, with both David Luiz and Nemanja Matic joining for in excess of £20 million.

Matic was actually included in the deal that saw Luiz move to Stamford Bridge, with Chelsea then paying £21 million to bring the Serbian back to the club three years later after he excelled in Lisbon.

But it was Axel Witsel who made the record departure from Benfica, with the Belgium international joining Zenit St Petersburg for €40 million in September 2012.

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