In between Roma vs Porto I am guessing Roma to win.
I'll tend to prefer to choose Porto from both teams, As Roma have really been unreliable this season and Porto seem to be the better side in terms of H2H match up.
Here are some observation about the match:
Roma never beaten Porto, they need a revenge
Roma lost their last two matches of the group stage, so they need to come back.
Edin Džeko (Roma) has five goals in four CL matches this campaign. Porto might rely on Tiquinho Soares, who’s scored four goals in his last five competitive games.
However this is something very important. Porto, in all competitions, they are unbeaten in 14 away games, and won 3-0 at this venue in 2016.
Question is can Roma stop them?
I am in doubt now LOL