Gus Poyet has disappointed Southampton by agreeing a new, improved two-year contract with Sunderland, intended to keep him on Wearside until at least 2016.

Although the Uruguayan told Ellis Short, the Sunderland owner, that he wanted to stay put three weeks ago certain details had still to be finalised and nothing was formalised until a meeting with the board on Wednesday.

There had been concerns among fans that Poyet, whose old, one-year deal contained an exit clause which, until the end of this month, would have enabled a club to poach him without paying compensation, might be tempted by a move south.

Instead the manager responsible for Sunderland’s incredible escape from relegation has negotiated an agreement that is understood to extend his sphere of influence to assorted areas, including the academy.

Poyet is also believed to have received assurances over both the scale of the summer transfer budget and the parameters of his working relationship with Lee Congerton, Sunderland’s director of football. Bargaining from a position of strength, he appears to have gained increased control.