 
| Roles | Competed in Olympic Games | 
|---|---|
| Sex | Male | 
| Full name | Folke Frithiof Martens•Mårtensson | 
| Used name | Frithiof•Mårtensson | 
| Born | 19 May 1884 in Eslöv, Skåne (SWE) | 
| Died | 20 June 1956 in Stockholm, Stockholm (SWE) | 
| Measurements | 70 kg | 
| Affiliations | IK Sparta, Malmö (SWE) | 
| NOC |  Sweden | 
| Medals | OG | 
| Gold | 1 | 
| Silver | 0 | 
| Bronze | 0 | 
| Total | 1 | 
Frithiof Mårtensson had the following finishes at major championships – 1908 World Championship: 75.0 kg. Greco-Roman (5th); 1909 Unofficial European Championship: Unlimited Greco-Roman (1st).
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1908 Summer Olympics | Wrestling |  SWE | Frithiof Mårtensson | |||
| Middleweight, Greco-Roman, Men (Olympic) | 1 | Gold |