As much as signing new players is important for Arsenal this summer, it must be remembered that only by selling some of the current squad can that be made possible.
New manager Unai Emery has been given just £50m to spend in the transfer window and that's not nearly enough to make any real changes.
Arsene Wenger is arguably to blame for that having splashed £55.5m to sign Pierre-Emerick Aubameyang from Borussia Dortmund in January.
So Emery must sell to sign and given he's already close to bringing in four new players, the Spaniard needs to start making some big decisions.
Stephan Lichtsteiner has already joined the Gunners on a free, while Lucas Torreira (£26.5m), Sokratis Papastathopoulos (£16m) and Bernd Leno (£22m) could be on their way.
Signing those four players would take Emery's spend to almost £65m - so where's the other £15m going to come from?
A number of Arsenal players have been linked with moves away this summer, including Shkodran Mustafi, David Ospina and Lucas Perez.
With Leno's arrival reportedly imminent it's extremely likely Ospina will be sold, while Mustafi could also be made available for transfer.
Head of recruitment Sven Mislintat isn't the German's biggest fan and has doubts about his ability as a centre-back.
And then there's Perez, who Arsenal fans grew to love during his debut season and want to see return to the club following his loan spell at Deportivo La Coruna.
Emery was due to hold talks with the Spaniard about his Arsenal future and now, according to the Evening Standard, he's made a decision.
But it's bad news. Emery is going to tell Perez he can leave this summer just two years after joining the Gunners for £17m.
It's a decision Arsenal fans won't take lightly given their lack of wide options, but Perez is 29 years old now and will want guaranteed minutes, which Emery simply can't give him.
Perez never quite made his mark at Arsenal but he'll leave knowing he was adored by the club's fans, who know he has so much more to offer.
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