Aaron Cresswell has extended his stay at West Ham by signing a new five-year contract.
Phil Jones has signed a new deal with Manchester United which keeps him at Old Trafford until June 2019.
Sunderland have completed the signing of Senegal international Kader Mangane on loan.
The 29-year-old has agreed personal terms and Sunderland on loan from Saudi Arabian club Al-Hilal until the end of the season, with a view to making the move permanent in the summer.
Mangane becomes their second signing of the transfer window after Alfred N'Diaye joined from Bursaspor last week.
Mangane began his career in his native Senegal before spending six years in Switzerland. He played for Lens and Rennes in the French Ligue One before moving to Saudi Arabia in 2012.
Sunderland manager Martin O'Neill said: "Kader is player who will add to the overall strength of our squad and give us options. He will improve competition for places and we are delighted to welcome him to the club."