Ben Doak has been ruled out of Scotland's upcoming U21 fixtures after collapsing on the pitch during Liverpool's UEFA Youth League game last week.
The 17-year-old starlet clashed heads with one of the Sporting CP players on Tuesday afternoon when they both challenged for a high ball.
Doak managed to stay on his feet immediately after the knock but fell to the floor just moments later. As a result, the medical team rushed onto the pitch.
Doak appeared to be okay as he left the pitch just nine minutes into the game but he has been ruled out of Scotland's upcoming U21 fixtures.