Udinese is not a weak team. This team often surprises everyone with good performances. And I have seen Udinese players perform well against big teams in several matches. Udinese managed to score 2 goals in the home match against Inter Milan. Although Udinese failed to win the match, Udinese's performance was still good.
Inter Milan is currently 3 points ahead of Napoli. Inter Milan is in a somewhat safe zone. Even then, if they want to win the title, they have to play well consistently. There is no alternative. Inter Milan has a very busy schedule. So it will be difficult for Milan to continue its good performance.
Udinese is quite tough in holding Napoli and Lazio to a draw so facing them is not an easy job even though their overall game is also inconsistent. Inter Milan is indeed much more likely to win the match, but they need to be careful so that there are no unexpected surprises. A three-point advantage over Napoli is something that is very advantageous, but with the remaining match conditions, Inter Milan must be truly consistent.
Inter Milan also need to prepare for the match against Bayern Munich in the Champions League, so if the coach places the wrong strategy it will affect the results they will get and in the end will make Napoli feel at an advantage and if they don't want this to happen Inter Milan must really focus on the remaining matches.