Milan has confirmed that Rafael Leao has suffered a thigh injury during his time with the representative and will be out for a few weeks.
The striker was playing for Portugal U-21 against the Netherlands on Thursday when he suffered the injury.
The club in the announcement confirms that it has to do with a muscle problem in the right thigh.
Further tests will be done after 10 days, which means he will be out for at least two weeks.
The 21-year-old has scored three goals and donated three assists in 10 official games for Milan this season.