So far I know of the following: Barcelona <- Van Bommel (PSV) <- Ezquerro (Athletic Bilbao) Saviola (?) -> Albertini (?) -> Gerard (Monaco) -> Real Madrid <- Pablo Garcia (Osasuna) <- Diogo (River Plate) Solari (Inter) -> Chelsea <- Del Horno (Athletic Bilbao) <- Crespo (AC Milan loan ended) <- Diarra (Le Harvre) <- Wright-Phillips (Man. City) Smertin (Charlton) -> Forsell (Birmingham) -> Parker (Newcastle) -> Arsenal <- Hleb (Stuttgart) Viera (Juventus) -> Man. United <- Ji-Sung Park (PSV) <- Van der Sar (Fulham) Juventus <- Viera (Arsenal) <- Kovac (Bayern) Kapo (Monaco) -> AC Milan <- Vieri (Inter) <- Gilardino (Parma) <- Jankulovski (Udinese) <- Vogel (PSV) Tomasson (Stuttgart) -> Internazionale <- David Pizarro (Udinese) <- Julio Cesar (Chievo) <- Solari (Real Madrid) <- Wome (Brescia) Vieri (AC Milan) -> Bayern <- Ismael (Bremen) <- Lahm (Stuttgart loan ended) <- Karimi (Al-Ahli) Frings (Bremen) -> Kovac (Juventus) -> Lyon <- Carew (Besiktas) Benfica <- Léo (Santos) Sokota (Porto) -> Porto <- Anderson (Gremio) <- Sokota (Benfica) As I searched this out, I found a site with lots of info and tables of European transfers: http://soccer-europe.com/Transfers/Menu.html
Porto <- Anderson (Grémio Porto Alegre) 5.5 M (for 70%) <- Lucho Gonzalez (River Plate) 6 M <- Lisandro Lopez (Velez Sarsfield) 2.5 M (for 50%) <- Sokota (Benfica) Free Transfer <- Jorginho (Setúbal) Free Transfer <- Fatih Sonkaya (Besiktas) 1.5 M <- Helton (U.Leiria) 1.5 M Maniche (Dinamo Moskow) -> 16 M Costinha (Dinamo Moskow) -> 4 M Seitaridis (Dinamo Moskow) -> 10 M Nuno E.Santo (Dinamo Moskow) -> 2.5 M
Pancaro (Fiorentina) -> Dhorasoo (PSG) -> Abbiati (Genoa) [Loan] -> Brocchi (Fiorentina) -> Gilardino deal has not been finalized yet.