AC Milan ace Ronaldinho admits this weekend's derby against Inter could be decisive in their title challenge.

"It's a long season but it would be very important to reduce the gap between us," he admitted.

"Serie A is tough and it's difficult to overcome even the small teams. In the end, the team that wavers less will prevail.

"There is a positive atmosphere at Milan and I would like to lift some trophies in Italy. We can still achieve all of our targets."