Before the first match, I thought that Barcelona would dominate, at least in the home match for sure, but at the Camp Nou it was a very equal game, and I even liked more the way Manchester United played. The second match will be just as difficult for both teams, but I am of the opinion that Manchester United at home will be even more dangerous, and they have an advantage because they managed to score two goals away, but this is not a very big advantage, all the struggle in this confrontation is still ahead.
Marcus Rashford of Manchester United is in excellent form and may make a deference for Manchester United, as he and his teammates can defeat Barcelona and qualify for the Europa League round of 16; however, Barcelona can also win the match.
Nevertheless, because of their recent form in the Premier League, I have high hopes for Manchester United.
If I consider the odds available right now then obviously Roma are still the big favorites to win but yes, even though Roma have a great coach like Mourinho. But for me personally at this moment Mourinho's job is still not easy, because Salzburg is also not a weak team that is easy to beat.
So with the aggregate advantage that Salzburg already has, then of course Salzburg will still be able to play well in the second leg later. With these factors, of course there is no guarantee for Roma to be able to beat Salzburg in the second leg later.
It will be a difficult match for Roma because Salzburg will come prepared hoping to get three points or at least a draw in the match to knock Roma out of the competition. Roma will also be prepared for a win with more goals, which will make the match more difficult for Roma, but their win against Verona in their last League match will also give them a little hope in the match.