Lee Johnson says Jermain Defoe's mooted return to Sunderland is a 'fantastic idea in principle' but cautions that any deal would have to be right for all parties.
Defoe left his role as player-coach at Glasgow Rangers this month and has been heavily linked with a move back to Wearside as a free agent, four-a-half years after he left the Black Cats in the wake of the club's relegation from the Premier League.
And this morning he told radio station Talksport: "To be honest, it's been mad. My phone has gone mad.
