Former Arsenal right-back Emmanuel Eboue is training with Sunderland, Press Association Sport reports.
Eboue, 32, has been without a club since the summer, when his contract with Turkish side Galatasaray expired.
The defender last played a competitive match in May and is now training with the Black Cats as he looks to find a new club.
PA Sport reports that he is only training with Sam Allardyce's side to keep fit, but they have the option to sign the Ivorian despite the transfer window closing.
Sunderland have two available spaces in their 25-man Premier League squad and Eboue would provide competition at right-back with Billy Jones and DeAndre Yedlin.
Eboue is a cult figure at Arsenal, where he made 214 appearances between 2005 and 2011.