Summary:
Sunderland have confirmed they are interested in a former England international but are unsure if he will be sold.

Full article:
Former Tottenham and Manchester City defender Vedran Corluka has emerged as a target for Sunderland. The 28-year-old is playing for Lokomotiv Moscow but the Russian club will sell for around £4.8million. Gus Poyet also has an interest in Stoke defender Geoff Cameron but has been rebuffed in an enquiry for Atletico Madrid's Toby Alderweireld. Wanted man: Sunderland have shown an interest in Croatia international Vedran Corluka . Possible return: Corluka spent five years in England with Manchester City (right) and Tottenham .