Roma are playing against Udinese away tomorrow. It shouldn't be a big deal for them actually. Udinese are far worse and having serious trouble with defending.
On the other hand Roma's problem is with their scoring. 27 goals is just too low in 22 matches. They are still somehow in top 4. Mostly with wins by close margins. I still doubt their CL chance at the end of the season.
Udinese game seems an easy game to be capitalized by Roma. From last five games they played Udinese, they never lose home or away game. So i think it's very certain if they will bag three points from Udinese since there's no big change from both of club during the winter window. So we can still expect them to beat Udinese with at least two goals same as the first leg.
Three points from Udinese is a must caused by they will have tougher fixtures to come. Unable to finish above Juve or Napoli until the end of this month will put their UCL chance looks impossible to achieve.
Beside that i know their productivity is making you feel pessimistic to them in securing UCL spot. However, even if they win the game with narrow score, as long as it's win, that's enough. The most important thing is how to win, not how many goals produced.
I know goals lead team to win, but good defend can help them to achieve their target.