Arsene Wenger has made his second signing of the summer after landing Mathieu Flamini on a free transfer.
The midfielder, who left the Gunners in 2008 to join AC Milan, is believed to have agreed a three-year deal worth £40,000-a-week.
Flamini, 29, is the second arrival at the Emirates this summer after French striker Yaya Sanogo, who joined from Auxerre on a free transfer in July.
Flamini has been training with Arsenal during pre-season after he was released by AC Milan at the end of last term.
Last week Wenger moved to praise the midfielder, but appeared to play down suggestions he would sign for the club.
‘He is just here to work on his fitness and he does that very well,’ said Wenger. ‘I don’t say there’s no chance and I don’t say there is a chance [of signing him].’
Flamini joined Arsenal in 2004 and made over 100 appearances for the Gunners before joining AC Milan on a free transfer four years later.
He becomes the fourth player to resign for Wenger during the Frenchman’s tenure at the club with Sol Campbell, Jens Lehmann and Thierry Henry also
returning for second spells with the Gunners.