The idea of a player crossing the divide and joining a bitter rival can seem almost like sacrilege for fans. With Noni Madueke becoming the latest to move from Stamford Bridge to the Emirates, it continues a recent trend of transfers between Arsenal and Chelsea.

"Noni is an exciting and powerful young player, with his performances and numbers in recent seasons being of consistently high quality," Mikel Arteta said of Madueke.

From Arteta's call with Madueke and his father to the role of agent Ali Barat and sporting director Berta, here's how the deal was done