Nemanja Matic for David Luiz
In January 2011, Chelsea snapped up Brazilian maverick David Luiz from Benfica for a fee of approximately £21.3 million. In order to sweeten this particular deal, the Blues also sent midfielder Nemaja Matic to Portugal.
After starring in central midfield the the Estadio da Luz, however, the Serbian international was swiftly brought back to Stamford Bridge by Jose Mourinho during the recent January transfer window.
WINNER - BENFICA
While Chelsea now boast the talents of both Luiz and Matic, we're giving this one to the Primeira Liga side. As well as being significantly reimbursed for the loss of Luiz, they also received hefty compensation for Matic.
Besides, Chelsea can hardly been seen as the winner of this particular deal given that they spent a considerable amount of money just to get back a player they had gotten rid of just three years previously.