Milan and Juve are battling at the top of the table.
"When a side [Juventus] is unbeaten after 13 games then it means that they are good technically, they have character and everything needed to fight until the very end," said Allegri.
"We have to do the best we can during our next three League games before Christmas. We'll look to end the solar year in the best shape possible.
"Inter? They are 13 points from us and 15 from Juve. There are a lot of sides in between us too, but they have what is needed to climb back up the table - especially when Wesley Sneijder and Douglas Maicon return.
"They can start a winning streak of games."