It's no wonder Arsenal and West Ham took so long to find common ground on Declan Rice — the new £105million man is the first player the Gunners have ever bought from their London rivals.
14 players have gone the other way from north to east London in the Premier League era, however, making it one of the most commonly trodden routes between clubs even though it has earned Arsenal only £12.7m back in fees.
Here, Mail Sport reveals each top-flight club’s favourite wells to return to since the Premier League began… and finds out which teams have been fleecing each other!
ARSENAL
Favourite club: CHELSEA (8 players signed, £100m)
William Gallas, Lassana Diarra, Yossi Benayoun (loan), Petr Cech, David Luiz, Willian, Jorginho, Kai Havertz.
ASTON VILLA
Favourite club: TOTTENHAM (9 players, £8.3m)
Colin Calderwood, David Ginola, Oyvind Leonhardsen, Wayne Routledge, Kyle Walker (loan), Jermaine Jenas (loan), Alan Hutton, Simon Dawkins (loan), Josh Onomah (loan).
BOURNEMOUTH
Favourite club: SOUTHAMPTON (19 players, £53,000)
Ian Andrews, Christer Warren, Neil Moss, Alan Blayney (loan), Scott McDonald (loan), Martin Cranie (loan), Matt Mills (loan), Andrew Surman (loan), Leon Best (loan), Simon Gillett (loan), David McGoldrick (loan), Adam Lallana (loan), Jake Thomson (loan), Ryan Doble (loan), Lee Barnard (loan), Danny Seaborne (loan), Artur Boruc, Shane Long (loan), Jack Stephens (loan).
BRENTFORD
Favourite club: READING (12 players, £0)
Anthony Rougier, John Salako, Lloyd Owusu, Paul Brooker, Ricky Newman, Simon Cox (loan), Ben Hamer (loan), John Halls, Alan Bennett, Mikkel Andersen (loan), Alex McCarthy (loan), Nicholas Bignall (loan).
BRIGHTON
Favourite club: CHELSEA (8 players, £8.4m)
Leon Knight, Alexis Nicholas, Liam Bridcutt,
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