Arsenal need to stand firm in the valuation of one of their unwanted players this summer to prove that they can sell effectively. Arsenal must demonstrate in the upcoming summer transfer window that they can extract top value from their outgoing players. This summer is likely to see plenty of departures from the Emirates Stadium. Thirteen players could leave Arsenal in the next transfer window. There are some big names on this list, including Jorginho, Thomas Partey, Emile Smith Rowe, Kieran Tierney, and Aaron Ramsdale. Arsenal are already aware that Ramsdale is almost certain to leave at the …