Eighth place beat ninth place in a game Catania dominated.
It took until the 49th minute of the second half before fans at this Serie A clash saw a goal.
However, Catania then put three into Udinese’s net by the 71st minute, with a brace from Alejandro Gomez and a strike from Francesco Lodi.
A late consolation from Luis Muriel was not enough to save the visitors as Catania ended a run that had seen them lose their last two league games.
The home side have now gone above Roma to seventh in Serie A.
Watch the highlights from the game below.
First half highlights
Second half highlights