Sunderland manager Martin O'Neill believes new signing Alfred N'Diaye will help "freshen things up" at the Stadium of Light.
The midfielder joined the Black Cats on a three-and-a-half year deal on Wednesday, and is now waiting for international clearance before he can make his debut on Wearside.
Speaking ahead of Saturday's clash with West Ham, O'Neill said:
"There's a couple of things still to be signed. I think it's international clearance. "He's very athletic, and he's very young so I think there's a lot of [room] for improvement in his game. "I think he'll help freshen things up, and over the course of time I do genuinely think that he will improve us in many aspects as well as improving his own game."
The 22-year-old could be included in the squad to face the Hammers if the Premier League receive the necessary international clearance from the Turkish FA before Friday's noon deadline.