In this case I did the following:
1. I went here
http://soccernet.espn.go.com/player/_/id/102198/arturo-vidal?cc=5739 and I clicked on appearances. There I saw which serie A games he missed. The Novara and Catania matches aren't even mentioned (because he was banned) and for the Genoa match it says that he was an unused sub.
2. For the coppa matches I went here
http://www.legaseriea.it/it/tim-cup/calendario-e-risultati and I clicked on that M sign to see the team that faced Milan. Then I chose Quarti di finale and Ottavi di finale to check the team that played vs Roma and Bologna.
Soccernet and lega serie A sites are more or less enough to check serie A and coppa italia related stuff.