| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | Thorsten Gustav Magnus Henning•Grönfors |
| Used name | Thorsten•Grönfors |
| Born | 8 August 1888 in Lund, Skåne (SWE) |
| Died | 28 May 1968 (aged 79 years 9 months 20 days) in Stockholm, Stockholm (SWE) |
| Affiliations | KSSS, Saltsjöbaden, Nacka (SWE) / KLTK, Stockholm (SWE) |
| NOC | Sweden |
Torsten Grönfors played four tennis events at the 1912 Stockholm Olympics and also competed in sailing, aboard the KSSS 1912 in the 8-metre class. His best finish was fourth in outdoor mixed doubles with Annie Holmström. At the Stockholm Championships, Grönfors won the singles in 1912 and was runner-up in 1910. At Swedish Indoor Championships he won the men’s singles three times (1913-15) and the men’s doubles four times, always with Frans Möller. Grönfors represented the KLTK (Kungliga Lawn Tennis Klubben) in tennis and the Royal Swedish Yacht Club (Kungliga Svenska Segel Sällskapet [KSSS]) in sailing. The yacht KSSS 1912, named after his club, scored no points at the 1912 Olympic Games, placing sixth of seven yachts in both races.
Grönfors graduated from high school in Stockholm in 1907 and in law in 1917. After working for private law firms, he established his own law office in Stockholm in 1925. He specialized in traffic and tort cases with criminal cases. From 1926-34, he was a lawyer for the Royal Swedish Automobile Club. In 1923, he married Eleonora “Nora” Sofia Fredrika Hamberg and had one son. Grönfors was appointed a Knight of the Vasa Order.
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1912 Summer Olympics | Sailing | SWE |
Thorsten Grönfors | |||
| 8 metres, Open (Olympic) | K.S.S.S. 1912 | =5 | ||||
| Tennis | SWE |
Thorsten Grönfors | ||||
| Singles, Men (Olympic) | =17 | |||||
| Doubles, Mixed (Olympic) | Annie Holmström | 4 | ||||
| Doubles, Men (Olympic) | Frans Möller | =15 | ||||
| Singles, Covered Courts, Men (Olympic) | =9 | |||||
| Doubles, Covered Courts, Men (Olympic) | Frans Möller |