Arsenal are extremely busy in the summer transfer window, having completed a signing while negotiating deals for Chelsea winger Noni Madueke and Sporting Lisbon striker Viktor Gyokeres

Twomey: The success of Chelsea’s recruitment model depends just as much on their ability to sell profitably as it does on buying intelligently. Every player who is not absolutely integral to the team Maresca is building has a price, and Madueke has never managed to make himself indispensable at Stamford Bridge.