Chelsea's extraordinary summer transfer window could see as many as seven first-team players depart the club for Saudi Arabia. Edouard Mendy, N'Golo Kante, Hakim Ziyech, Romelu Lukaku, Calum Hudson-Odoi, Pierre-Emerick Aubameyang, and Kalidou Koulibaly have all either already left, or are currently in talks with the league, but is there more to this than simple player exchanges?