Pedzisa mutsara unotevera: Mushure mekukura muchikamu chevechidiki cheTorino, Tagnin akazokwidziridzwa kuchikwata chevakuru vekirabhu, asi akatanga basa rake rehunyanzvi mumwaka wa1952/53, pachikwereti kukirabhu yekumusha kwake Alessandria, muSerie C. Akadzokera kuTorino mwaka unotevera, uye akaramba ari mukirabhu kusvika 1954, achiita Serie A yake yekutanga nekirabhu mumutambo we1<unk>1 kure naSampdoria, musi wa13 Gunyana 1953. Akazotambirawo Monza muSerie B (1954<unk>57), achidzokera kuAlessandria kwenguva pfupi ye1957<unk>58 Serie A mwaka. Tagnin gare gare akatambira Lazio (
1958<unk>59), kwaakakunda Coppa Italia muna 1958, uye Bari (1959<unk>61), asi akazobvumirwa kurambidzwa kwemwaka miviri nehafu mushure mekupomerwa mhosva yekubatanidzwa mukubhejera. Mutongo wake wakaderedzwa negore gare gare, uye muna 1962, akabatana neInternazionale, kwaakange aine hunhu hwake hunoshamisa, achigara nekirabhu kusvika 1965, mushure mekurwira kuwana nguva yekutamba pamberi pemutambi wechidiki anozvidzivirira Gianfranco Bedin mumwaka wake wekupedzisira nechikwata. Tagnin akapedza basa rake mushure megore ra1965-66, achidzokera kuAlessandria zvakare, muSerie B.