ronaldo
Dennis Law and Carlos Tevez are players that formerly played for Manchester United and moved to Manchester City
Beckham Adebayor-On loan to Real Madrid from Manchester City
Cristiano Ronaldo was but since he has been transfered to Real Madrid it is now (in my opinion) Ryan Giggs.
Manchester City, Real Madrid, Chelsea, Manchester United, and Inter Milan.
Robinho
Nicolas Anelka has played for Arsenal, Liverpool, Manchester City in the respective derbies, Real Madrid in the Champions League final and in Euro 2000 and 2008.
Peter Beardsley
Craig bellamy is the only one i can think of
Madrid is the largest city in Spain and the third largest city in Europe.
robinho from real Madrid to Manchester city for about £32.5 million pounds Robinho for £32.5 million pounds from real Madrid to Manchester city
Eto
Sergio Aguero, on top of playing for his National Argentinian team, has played for Independiente, Atletico Madrid and Manchester City. He played for Atletico Madrid and Manchester City after his move to Europe in 2006.