 Zenoni akatanga basa rake nekirabhu yekumusha kwake Atalanta BC, achibatana nechikwata chevechidiki muna 1994. Mushure mekusimudzirwa kuchikwata chekutanga, muna 1996, Zenoni akakweretwa kuSerie C1 divi A.C. Pistoiese kwemwaka kuti awane nguva yekutamba uye ruzivo. Mwaka unotevera, akaita Serie A yake kutanga neAtalanta musi wa5 Gumiguru 1997, mukukwikwidza 11 kurwisa vaikwikwidza Brescia; muhuwandu akaita mitambo gumi neshanu mumwaka wese. Pasinei nemitambo yake yakavimbisa yekirabhu, haana kukwanisa kubatsira Atalanta kudzivirira kudzikiswa kuSerie B. Akazobatsira Atalanta kuwana kukwidziridzwa kuSerie A mumwaka wa1999-2000 uye mwaka unotevera, iye nemukoma wake Damiano vakazvisimbisa sevamwe vevadiki vanonakidza vepamberi muligi. Inotsanangurwa nepepanhau semukana wechidiki unovimbisa, munaJune 2001, Cristian akaendeswa kuAC Milan pamwe naMassimo Donati kwemabhiriyoni makumi matanhatu emadhora eItaly mubhadharo wemari pamwe nemutambi mutambi aive akawanda, asi akakurumidza kuendeswa kuJuventus F.C. sechikamu cheFilipo Inzaghis kutamisa mune imwe nzira, akaiswa pamakumi matatu emadhora emadhora eItaly kana anenge 15.6M. Akasaina chibvumirano chemakore mashanu. Muzhizha ra2003, Zenoni akakweretwa kuUC Sampdoria nesarudzo yekusaina zvachose kwe10 mamirioni euros. Akakweretwa kukirabhu zvakare muzhizha ra2004, uye pakupera kwemwaka wa2004-05, mushure mekunge angobatsira timu kuti ikwanise kuenda kuUEFA Champions League, akasainwa zvachose neSampodoria ye 1M. Mushure memwaka yakati wandei kuGenoa, muna 2008, Zenoni akabatana neBologna. Muna 2010, akatamira kuAlbinoLeffe, kwaakagara kusvika muna 2011. Akapedza basa rake mushure mekupedza mwaka wa2011-12 neMonza, muLega Pro. Pakazara, akaita 546 nyanzvi kuoneka, achiwana zvibodzwa gumi. 