In the meantime, test your knowledge of the Black Cats' signings from the last decade - some well known, some less so - and see if you can figure out the face from the clue. Keep a note of your answers, they're revealed at the end.
5. I arrived at the Stadium of Light for £2.5m in 2013/14.
a). Fabio Borini. b). Emanuele Giaccherini. c). Charalampos Mavrias. d). Valentin Roberge. (Photo credit should read GLYN KIRK/AFP via Getty Images) Photo: GLYN KIRK
6. I was snapped up on a free transfer in 2014/15. I'm now playing in Cyprus.
a). Costel Pantilimon. b). Oscar Ustari. c). Vito Mannone. d). Keiren Westwood. (Photo credit should read Ian MacNicol/AFP via Getty Images) Photo: IAN MACNICOL
7. I was the most expensive signing in Sunderland's 2015/16 £50m spending spree
a). Lamine Kone. b). Jermain Lens. c). Wahbi Khazri. d). Ricardo Alvarez. (Photo by Gareth Copley/Getty Images) Photo: Gareth Copley
8. I was sold to a Portugese side in 2016/17, after two years on the books.
a). Emanuele Giaccherini. b). Sebastian Coates. c). Santiago Vergini. d). Jordi Gomez. (Photo by Laurence Griffiths/Getty Images) Photo: Laurence Griffiths