Celtic are reportedly in negotiations with former Sunderland goalkeeper Craig Gordon, who is keen to rebuild his career this summer.
The Scotland international has been without a club since being released by the Black Cats in 2012 following excessive knee injuries.
Gordon has enjoyed training spells with Rangers and Hearts this year and, according to Sky Sports News, the 31-year-old is being lined up by the Scottish champions.
The Bhoys' current number one, Fraser Forster, has been strongly linked with a move to the Premier League this summer and a move for Gordon would fuel further speculation over the Englishman's future in Scotland.