De Rossi has got great potential with Roma but what I can't really tell at the moment is if he will be able to get the team to the finals because he's not actually looking like he will be able to do such, he's actually been doing so well so far but he's not looking promising yet with the team as he did started with a very consistent tactics which was at the moment productive but later on his productivity began to drop.
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In order to get to the final, Roma must first beat Milan, and then the winner of the Bayer - West Ham pair (Bayer). I think the probability of this is no more than 10%. The problem for Rossi is that Mourinho has set the bar very high and even repeating it will be difficult. In general, everything can end as if there was no change of coach (if Milan knocks out Roma, and in Serie A Roma does not reach the top 4).
I am glad that at the moment the Bayer - Liverpool final is becoming more and more likely, although Bayer has a more difficult path.