Clarence Seedorf believes next week's game against Barcelona will reveal a lot about the true strength of Milan.
The two teams meet in the Champions League on Tuesday when the Italian Scudetto holders arrive at the Nou Camp.
"We need important tests like the one on Tuesday to understand how far we can go this season," the Dutchman, 35, told Milan Channel.
"Barcelona are the best of the best right now and we'll be able to verify our value in the game against them."
Milan have made it clear that after triumphing domestically, they want to win Europe's premier club competition this term.
And Seedorf thinks that Italian international Antonio Cassano could help them achieve success in 2011-12.
"I don't know what happened after the Italy-Spain match last month, but he seems different," added the midfielder.
"He's not the same guy in training or off the pitch. If he can keep up all of these little improvements then he could be decisive for us."