The club has spent £30 million to bring Diarra on board, making it their most expensive transfer to date.

Diarra, a Senegal international, has signed a five-year contract with Sunderland, committing to the team for an extended period.

In a statement, Diarra expressed his enthusiasm about joining the team, saying, "I'm happy and excited to become a part of the Sunderland family. I'm eager to experience the Stadium of Light and meet the passionate fans."

He also emphasized his determination to contribute to the team's success, stating, "Everyone saw our achievements last season, and I'm confident that I can make a significant impact. I'm ready to give my all and fight for the team's colours in the Premier League."

With Diarra's arrival, Sunderland is expected to replace the void left by Jobe Bellingham, who recently moved to Borussia Dortmund.