Centre back Thomas Vermaelen is expected to be back in training with the first-team squad in around a month.
Vermaelen has undergone a minor procedure to remove an inflamed plantaris tendon from his left ankle.
This is the same treatment that he had on his right ankle in January this year and has nothing to do with his Achilles tendon.
The action was taken after consultation with specialists who advised this was the best thing to do to prevent it becoming a persistent problem.Copyright 2016 The Arsenal Football Club plc. Permission to use quotations from this article is granted subject to appropriate credit being given to www.arsenal.com as the source