All Tennis Players How Many Grand Slams Has Dominic Thiem Won? Dominic Thiem (German pronunciation: [ˈdɔmɪnɪk ˈtiːm]; born 3 September 1993) is an Austrian professional tennis player.Dominic Thiem has won 1 Grand Slam. Facebook Twitter Email How Many Grand Slams Has Aryna Sabalenka Won? How Many Grand Slams Has Carlos Alcaraz Won? How Many Grand Slams Has Elena Rybakina Won?