Nikola Popov - Football referee
| UEFA Youth League 2019-2020 | ||||
| 1st round | Domzale Youth | Viitorul Constanta Youth | 2019-10-22 | 2-0 |
| Europa League 2019 - 2020 | ||||
| 1st qualifying round | Breidablik | Vaduz | 2019-07-11 | 0-0 |
| Euro 2020 qualifiers | ||||
| Armenia | Liechtenstein | 2019-06-08 | 3-0 | |
| Euro 2019 u19 qualifiers | ||||
| Denmark u19 | Italy u19 | 2018-10-16 | 0 - 1 | |
| Finland u19 | Denmark u19 | 2018-10-10 | 0 - 0 | |
| UEFA Youth League 2018-2019 | ||||
| group stage | Lyon Youth | Shakhtar Youth | 2018-10-02 | 2 - 0 |
| Europa League 2018 - 2019 | ||||
| qualifiers 2nd round | Apollon | Zeljeznicar | 2018-08-02 | 3 - 1 |
| qualifiers 1st round | Derry | Dinamo Minsk | 2018-07-12 | 0 - 2 |
| Euro 2019 u21 qualifiers | ||||
| Armenia u21 | Russia u21 | 2017-11-10 | 1 - 2 | |
| UEFA Youth League 2017-2018 | ||||
| group stage | Besiktas Youth | Monaco Youth | 2017-11-01 | 3 - 2 |
| Euro 2018 u19 qualifiers | ||||
| Ireland u19 | Serbia u19 | 2017-10-10 | 2 - 1 | |
| Serbia u19 | Cyprus u19 | 2017-10-04 | 1 - 0 | |
| Europa League 2017 - 2018 | ||||
| qualifiers 3rd round | AC Milan | Universitatea Craiova | 2017-08-03 | 2 - 0 |
| qualifiers 2nd round | Mladost Podgorica | Sturm Graz | 2017-07-20 | 0 - 3 |
| WC 2018 qualifiers - Europe | ||||
| Gibraltar | Cyprus | 2017-06-09 | 1 - 2 | |
| UEFA Youth League 2016-2017 | ||||
| group stage | Bayern Munich Youth | Atlético de Madrid Youth | 2016-12-06 | 1 - 1 |
| group stage | Dortmund Youth | Real Madrid Youth | 2016-09-27 | 2 - 5 |
| Europa League 2016 - 2017 | ||||
| qualifiers 3rd round | Maribor | Aberdeen | 2016-08-04 | 1 - 0 |
| Champions League 2016 - 2017 | ||||
| qualifiers 2nd round | Dundalk | Hafnarfjordur | 2016-07-13 | 1 - 1 |
| Tournoi Espoirs de Toulon 2016 | ||||
| 3rd place | Portugal u20 | Czech Republic u20 | 2016-05-29 | 1 - 1 |
| group stage | Paraguay u20 | England u20 | 2016-05-25 | 0 - 4 |
| group stage | England u20 | Portugal u20 | 2016-05-19 | 1 - 0 |
| UEFA Youth League 2015-2016 | ||||
| group stage | AS Roma Youth | BATE Youth | 2015-12-09 | 3 - 0 |
| Euro 2016 u19 qualifiers | ||||
| Moldova u19 | Lithuania u19 | 2015-11-15 | 0 - 1 | |
| Greece u19 | Moldova u19 | 2015-11-12 | 2 - 1 | |
| Euro 2017 u21 qualifiers | ||||
| Albania u21 | Hungary u21 | 2016-03-28 | 2 - 1 | |
| Kazakhstan u21 | Switzerland u21 | 2015-09-07 | 0 - 1 | |
| Europa League 2015 - 2016 | ||||
| 1st qualifying round | Cukaricki Stankom | Domzale | 2015-07-09 | 0 - 0 |
| UEFA Youth League 2014-2015 | ||||
| group stage | Dortmund Youth | Galatasaray Youth | 2014-11-04 | 5 - 2 |
| Europa League 2014 - 2015 | ||||
| qualifiers 1st round | B36 | Linfield | 2014-07-03 | 1 - 2 |
| UEFA Youth League 2013-2014 | ||||
| group stage | Atlético de Madrid Youth | Porto Youth | 2013-12-11 | 3 - 2 |
| Euro 2014 u17 qualifiers | ||||
| Lithuania u17 | Ukraine u17 | 2013-10-24 | 1 - 1 | |
| Ukraine u17 | Sweden u17 | 2013-10-22 | 0 - 0 | |
| Europa League 2013 - 2014 | ||||
| qualifiers 1st round | Broughton | Ventspils | 2013-07-04 | 1 - 1 |
| Euro 2015 u21 qualifiers | ||||
| Georgia u21 | Slovakia u21 | 2013-11-18 | 1 - 3 | |
| Azerbaijan u21 | Macedonia u21 | 2013-06-08 | 0 - 0 | |
| Europa League 2012 - 2013 | ||||
| qualifiers 1st round | Floriana FC | Elfsborg | 2012-07-10 | 0 - 4 |
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