I think the chances are still 50:50 because both teams have not performed too impressively throughout this season. Roma's defeat to Milan in the last match proved that their defense is still very fragile, perhaps both teams will score goals in this game. Before facing Roma, Porto will also face Sporting CP in the domestic league, which will drain most of their energy because if they lose, their position is threatened to be taken by SC Braga.
Porto will face the top of the standings in the domestic league today which in general will be very difficult to win even though the match takes place at their home ground. And Sporting CP also does not want to lose in today's match even though the team also has to keep some of its main players fit so they can go through an important match in the UCL play-off round. But for Roma I think the team only needs to deploy its best tactics when facing Porto in the Europa League play-off round because Porto can also surprise many people when playing outside its domestic league.
Fiorentina football team played last match against Inter Milan football team and we saw one sided game which was in the side of Fiorentina football team and that team did 3 goals in this match and Kean was the top performer of this match because he did 2 goals in this match, he did first goal at 68 minutes of the match and after this goal he did goal at 89 minutes of the match and bent the match to their sides. Ranieri did first goal of the match amd he did this goal at 59 minutes of the match but opponent team players could not do any goal in this match . Both teams were good competitor but Fiorentina played excellent in this match.We should appreciate Fiorentina team because that kind performance is not easy and that is at 5th position .