The clubs agreed a fee for Borini last week, but the Italian joined Liverpool on their pre-season tour to the USA rather than discussing personal terms with the Black Cats.

Sunderland boss Gus Poyet is anxious to hold talks with Borini, 23, who was a major success on Wearside last term.

But a shoulder injury, which he sustained against former club Roma in Boston, has complicated matters.

Meanwhile, after tying up the £1.5m signing of Chelsea’s Dutch left-back Patrick van Aanholt, 23, Poyet is still interested in versatile defender Santiago Vergini.