Manchester United are interested in signing Tottenham's Jan Vertonghen, according to the Daily Mail.
David Moyes and his coaching staff have been keeping close tabs on a number of centre-backs as Manchester United face the prospect of losing Nemanja Vidic and Rio Ferdinand at the end of the season.
Porto's Eliaquim Mangala was said to be at the top of Moyes' transfer wish-list, however the Frenchman failed to impress Phil Neville during the Manchester United coach's scouting trip to Portugal last week.
Reports suggest Manchester United have now switched their attention to Vertonghen.
The Belgium defender, who can play at centre-back and left-back, has settled into life in the Premier League with ease since signing from Ajax in July 2012.
Tottenham, who signed Vertonghen for £9.5million at the start of the 2012/13 campaign, will want a large fee for the defender as he is an important first-team regular at White Hart Lane.
Manchester United will face competition to sign the £20million-rated defender as Barcelona are also interested in enticing Vertonghen away from north London.
The 26-year-old has gone on record to say he would look to leave Tottenham if they failed to qualify for next season's Champions League.