A La Liga defender, represented by Juan Mata's father, is reportedly a January transfer target for Manchester United.
Real Valladolid centre-back Mohammed Salisu, 20, is being monitored by United according to El Diario De Valladolid.
The report (via Sport Witness), claims United, Norwich and Southampton have joined the battle to sign Salisu with fellow Premier League sides Everton and Newcastle United.
Salisu is yet to extend his contract at the Spanish club and the centre back, whose agent is Mata's father, is being tipped with a move to Old Trafford. United midfielder Mata is also represented by the same agency.
Ghanaian Salisu has one goal in 13 La Liga appearances this campaign after being promoted from the side's 'B' Team for the start of this season.