| Roles | Referee | 
|---|---|
| Sex | Male | 
| Full name | Diyan Hristov•Valkov | 
| Used name | Diyan•Valkov | 
| Born | 2 March 1977 in Varna, Varna (BUL) | 
| NOC |  Bulgaria | 
| Games | Sport (Discipline) / Event | NOC / Team | Phase | Unit | Role | As | |
|---|---|---|---|---|---|---|---|
| 2020 Summer Olympics | Football (Football) |  BUL | Diyan Valkov | ||||
| Football, Men (Olympic) | Match #1 | Brazil — Mexico | Assistant Referee #2 | ||||
| Football, Men (Olympic) | Match #6 | New Zealand — Romania | Assistant Referee #2 | ||||
| Football, Men (Olympic) | Match #3 | Argentina — Egypt | Assistant Referee #2 |