Victor Nilsson Lindelöfs Manchester United got a dream start in the first semi-final meeting at home against Roma.
Bruno Fernandes was able to put 1-0 after a delicious joint by Edinson Cavani.
But just minutes after United's lead goal, Paul Pogba got the ball on his hand and the referee pointed to the penalty spot.
A penalty that Lorenzo Pellegrini set safely.
Roma would also take the lead in the first half.
Edin Dzeko knocked home the 2 - 1 goal just outside the reach of the goalkeeper.
The match is in progress.