Manchester United are keeping tabs on Olympiacos striking sensation Charalampos Kostoulas ahead of the January transfer window, according to the Sun.
The 17-year-old Greece under-21 international forward has attracted the Red Devils after his impressive campaign with the under-19s last term and his current run with the senior team.
Kostoulas played a key role in helping the Olympiacos reserve squad win the UEFA Youth League last term, weighing in with five goals and two assists in eight games.