Udinese travel to the San Siro on Saturday to face the Nerazzurri.
“If you’re not careful with Inter then things become very difficult, more than it already is,” Guidolin told the press.
“We must not look backwards, but look to the future. They are the strongest team in Europe and we must not forget this. We cannot give anything away against Inter.
“Last year they also had a poor start, but they are still the most complete and difficult team to play. I am sure they will be prepared, but so will we be.”