Roma have lots of players on a yellow away from suspension. Among them De Rossi, Osvaldo and Krkic. The Fiorentina match (the one that should have been played yesterday) was really important for both teams, and there was a chance for lots of yellows and suspensions for Roma.
That's practically the biggest reason why it was better for us to play Cesena first.
On the other hand, we too have many players in danger of suspension. Among them the very important Marchisio and Barzagli. This way we will have them against Roma.