Sunderland have agreed a fee with Celtic for sought-after full-back Adam Matthews.
The Black Cats have a deal in place for the 23-year-old, who has been linked with a move back to his native Wales in recent months.
Matthews joined Celtic from Cardiff in July 2011 and has a year remaining on his contract.
He made 42 appearances for the Bhoys last season and picked up a fourth Scottish Premiership winners' medal in the process.
The news of Sunderland's bid comes after a busy few days for the Wearside...