Chelsea defender Marcos Alonso has opened the scoring against Manchester United from a close range.
The first half ended in a goalless draw, with The Blues dominating the tie at Old Trafford.
David de Gea was forced to make five saves in the first half to keep the score lone even.
In the 60th minute, the visitors finally took the lead after Alonso volleyed a loose ball from inside the penalty box.
Chelsea lead Manchester United at Old Trafford 1-0.