ˈʌmbɚtˌoʊ mæzˈɛɾi fˈoːɹ mˈeɪ nˈaɪntiːnhˈʌndɹɪd twˈɛnti sˈɪks twˈɛnti ˈeɪt mˈeɪ tˈuː θˈaʊzənd sˈɪks wʌz ɐn ɪtˈæliən tˈuːtˈaɪm wˈɜːld tʃˈæmpiən ɡɹˈænd pɹˈiː mˈoʊɾɚsˌaɪkəl ɹˈoʊd ɹˈeɪsɚ.
Umberto Masetti (4 May 1926 – 28 May 2006) was an Italian two-time World Champion Grand Prix motorcycle road racer.