Arsene Wenger’s men will now be looking to bounce back against West Ham on Sunday after their loss to Newcastle last weekend.
The Gunners have struggled for much of this season, having fallen out of the race for a top four finish in the Premier League.
Even so, a decent run of victories in the league as well as the Europa League in recent weeks saw Arsenal receive praises for redeeming their form.
Much of that progress was questioned again last weekend as Arsenal succumbed to a 2-1 defeat away to Newcastle, despite taking the lead in the first half.
And after Arsene Wenger’s major announcement about his departure on Friday, back in training was skipper Per Mertesacker earlier today.
The German veteran is also set to bring his career to end after this season is over but he has maintained a professional attitude in his final playing days.
Here were a few pictures as Mertesacker joined the rest of the squad in training on Saturday…