Manchester United singer Adnan Januzaj was recalled from his season-long loan at Borussia Dortmund after a disappointing spell in Germany.
The Belgian had made just 12 appearances and three starts for the Bundesliga club.
United boss Louis van Gaal said: "I believe in the talent of Adnan Januzaj, it shall be very difficult to play matches in Dortmund, unfortunately I was proved right but he can better train for us and maybe show his talent in the first team.
"He has been tested already this morning and he didn't play so much 90 minutes in the pre-season and he has to show his fitness in the second team."