I do agree that Roma will have a bigger chance to beat Feyenoord, but that's football and we do not really know what will happen. Plus there are a lot of time left, which means that we may end up seeing them play, and maybe have some important players injured. Like look at Lukaku, he has been great, if he gets seriously hurt and ends the season, can we say Roma is still the favourites?
How can Roma has a bigger chance? Feyenoord isn't a weak team, they are capable to defeat AS Roma. Moreover, all the players of Feyenoord seem ready to fight all out for the match, they have no injury problem. It is different with AS Roma, some players got injured such as Smalling, Kumbulla, Aouar, Dybala, and Tammy Abraham. AS Roma also too depends on Lukaku to win the match. If Lukaku can't score goals, AS Roma probably fails to win the match.
I am pretty sure that it may not be the case and we could end up seeing them change it all together. That's just how it is, it's football and injuries matter. I believe that we need to see the situation before we could decide who will win, and not really end up with anything else, bet very closely if you can. That would mean that if you bet just one day before the game, then it would be a lot more healthy for you.
The injury factor sometimes becomes the big factor of a team to play not in their best form. Losing the key players who have big roles, it will bring significant impact for the team. I'm not surprised if AS Roma can't perform as expected because they missed the players like Smalling, Aouar, and Dybala. We can feel it when Tammu Abraham injured for a long time.