Watford have announced the signing of Didier Ndong on loan from Sunderland.
The 23-year-old Gabon midfielder joins until the end of the season with an option for Watford to make the move permanent in the summer.
Ndong made 31 Premier League appearances for Sunderland last season, scoring one goal.
He could make his Watford debut with the visit of Chelsea on Monday 5 February.