Sunderland manager Steve Bruce will not make a decision about midfielder Sulley Muntari's future until the end of the season.
Muntari had a hand in the winner in the 2-1 victory against Bolton - forcing the ball home despite the efforts of Bolton defender Zat Knight to keep it out after Stephane Sessegnon had created the stoppage-time opening.
It has been a difficult time for the Ghana international since his January arrival from Inter Milan on loan, and there has been speculation he will return to Italy in the summer.
Bruce believes it is only now that Muntari is fit enough to play in the Barclays Premier League.
He said: "There's a deal in place for Sully but nothing has been finalised as yet. We will make a decision at the end of the season. The problem with Sully is fitness if I am honest. He did not play for six months this season.
"He won the Champions League with Inter but then found himself out of the side. He has just got to the level of fitness you need to play in the Premier League."