| Roles | Competed in Olympic Games • Referee | 
|---|---|
| Sex | Male | 
| Full name | Krešimir "Krešo"•Tretinjak | 
| Used name | Krešo•Tretinjak | 
| Other names | Крешимир "Крешо" Третињак | 
| Born | 4 July 1905 in Sveti Martin pod Okićem, Zagrebačka županija (CRO) | 
| Died | 22 September 1987 in Zagreb, Grad Zagreb (CRO) | 
| Affiliations | Zagreber Fechtclub, Zagreb (CRO) | 
| NOC |   Yugoslavia | 
| Nationality |   Croatia | 
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | Nationality | As | |
|---|---|---|---|---|---|---|---|
| 1936 Summer Olympics | Fencing |  YUG | 
 CRO | 
Krešo Tretinjak | |||
| Épée, Individual, Men (Olympic) | 8 p8 r1/4 | ||||||
| Sabre, Individual, Men (Olympic) | 8 p4 r1/4 | ||||||
| Sabre, Team, Men (Olympic) | Yugoslavia | 4 p7 r1/4 | 
| Games | Sport (Discipline) / Event | NOC / Team | Phase | Unit | Role | As | |
|---|---|---|---|---|---|---|---|
| 1936 Summer Olympics | Fencing |  YUG | 
Krešo Tretinjak | ||||
| Foil, Individual, Women (Olympic) | Round One | Pool 2 | Judge |