FC Porto have been the dominant force of Portuguese football for the last two decades, but what's truly remarkable is how many players they have supplied to Europe's top teams.
There philosophy is simple: Buy low, sell big.
Its not only players they have supplied. Jose Mourinho led the team to a Champions League trophy in 2004, a victory that catapulted him onto the world stage, since then he has become one of the best managers of all time.
André Villas-Boas also came from the Portuguese club, leading the team to an undefeated season in the league, only the second time it's been achieved. He has gone on to be recognised as one of the most talented young managers in the world, managing two of England's top teams briefly.
But where has the profit come from? It all started with the sale of Helder Postiga back in 2003, selling him to Tottenham for roughly £7m. Postiga never really settled, but that has not stopped other clubs from taking their talent.
Some of the world's biggest players have come and gone, the following list shows players who have cut their teeth in the blue and white of Porto, before being shipped out for a huge fee:
Porto managed to turn a profit on all these sales, and not just small profits; Hulk and Falcao both left for £34m each, whilst Anderson left for £26m.
Rodriguez and Moutinho were both sold to PSG for a combined fee of £60m, which is what Jose Mourinho payed for three of Porto players when he initially joined Chelsea nearly a decade ago.
It can be suggested that it was Mourinho who started the trend of throwing money at the Portuguese club, and since then it seems the worlds biggest clubs have got onto the act.
With the departure of Mangala and Fernando looking more and more likely, Stevan Defour being a long term target of Fulham, and Jackson Martinez scoring for fun it seems that the Porto conveyor belt will keep churning out players of the highest quality.
Picking up players from an South American pool of talent, it seems the club knows what it has to do to be successful - both on and off the pitch.
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