Nacho Monreal, Shkodran Mustafi and Hector Bellerin trained alongside their Arsenal team-mates on Wednesday in a timely boost for Arsene Wenger ahead of their Europa League last-16 second leg against AC Milan.
Both Monreal and Bellerin have been sidelined by injuries in recent weeks, while Shkodran Mustafi was forced off during the Gunners' win over Watford on Sunday.
But all three were put through their paces on Wednesday, with Alexandre Lacazette — who is out with a knee injury until next month — the only absentee from the session.