Which teams have made the biggest net profit over the summer transfer window?
Arsene Wenger successfully oversaw the signing of Alexandre Lacazette from Lyon for £52million while Sead Kolasinac joined from Schalke on a free transfer.
Arsenal balanced the books by selling Alex Oxlade-Chamberlain to Liverpool for £35m, Wojciech Szczesny to Juventus for £10m and Gabriel to Valencia a similar figure.
The Gunners also waved goodbye to Kieran Gibbs as the left-back headed to West Brom for £7m, leaving the London side in net profit for the summer.
However, their marginal gains are nothing compared to some of the big sellers this summer, with Borussia Dortmund and Monaco both raking in the cash from some huge transfers.
CIES Football Observatory have conducted a detailed report into transfer activity across all of Europe, identifying the top 10 clubs who have the biggest net profit after a frenetic few months, but who do you think is top?
Scroll through the gallery above to see which clubs from the main five European leagues have the biggest net profit after the summer transfer window, according to CIES Football Observatory.
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