Chelsea winger Christian Atsu is the latest player to be under consideration at Sunderland.
The 22-year-old Ghanaian has been interesting Everton, Aston Villa and West Ham but it has emerged that the Black Cats have also been in touch with Stamford Bridge.
It has been reported that Atsu, a former Porto youngster, has been given permission to talk to Sunderland about a loan move.
Gustavo Poyet is searching for a winger to improve his attacking options having so far struggled to get a deal done for Fabio Borini.
Poyet's side is due to face CD Nacional in Portugal tonight when he is expected to comment on the situation.