All Tennis Players How Many Grand Slams Has Thomas Johansson Won? Karl Thomas Conny Johansson (pronounced [ˈtʊ̌mːas ˈjûːanˌsɔn]; born 24 March 1975) is a Swedish retired professional tennis player.Thomas Johansson 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?