Ralf Rangnick says "promising talent" Hannibal Mejbri is now a full member of Manchester United 's first-team squad.
Mejbri's promotion comes after starring for Tunisia at the Africa Cup of Nations, having only turned 19 in January.
The dazzling midfielder made his Premier League debut on the final day of last season and is set to be included in the matchday squad for Friday's FA Cup fourth-round tie against Middlesbrough at Old Trafford.