7 clubs which are the masters of the transfer market

5) FC Porto

Porto have made over £500m in player sales over the last decade

FC Porto are one of the big three clubs in Portugal to have never been relegated, alongside Benfica and Sporting CP. They are the only team in Portuguese league history to have won the domestic league title twice (2010/11 and 2012/13) without losing a game the entire season.

Porto are the only club from Portugal to have won the UEFA Cup/Europa League, the UEFA Super Cup and the Intercontinental Cup, and to have achieved a continental treble of domestic league, domestic cup and European titles. Porto also hold a joint record for the number of appearances in the UEFA Champions League group stage (20) with Barcelona, Real Madrid and Manchester United.

The 27-time league winners consistently challenge for top honours in all domestic competitions while also bringing in a steady stream of money from the sales of their top performers. The club has made over £500 million in player sales over the last decade or so. They are known to extensively scout young talents from South American clubs.

PLAYER	BOUGHT FROM	BOUGHT FOR	SOLD TO	SOLD FOR	PROFIT
Hulk	Tokyo Verdy	£16.15m	Zenit St. Petersburg	£46.75m	£30.6m
Radamel Falcao	River Plate	£4.62m	Atletico Madrid	£34m	£29.38m
Jackson Martinez	Jaguares	£7.55m	Atletico Madrid	£31.54m	£23.99m
Eliaquim Mangala	Standard Liege	£5.74m	Manchester City	£25.93m	£20.19m
Danilo	Santos	£11.05m	Real Madrid	£26.78m	£15.73m
Joao Moutinho	Sporting CP	£9.35m	AS Monaco	£21.25m	£11.9m