Thorvaldur Arnason - Football referee
| Euro 2020 qualifiers | ||||
| San Marino | Russia | 2019-11-19 | 0-5 | |
| Euro 2020 u19 qualifiers | ||||
| Georgia u19 | Croatia u19 | 2019-10-15 | 2-0 | |
| Croatia u19 | Hungary u19 | 2019-10-12 | 2-0 | |
| Europa League 2019 - 2020 | ||||
| 2nd qualifying round | Gzira Utd | Ventspils | 2019-08-01 | 2-2 |
| Champions League 2019 - 2020 | ||||
| 1st qualifying round | Partizani | Qarabag | 2019-07-10 | 0-0 |
| Europa League 2018 - 2019 | ||||
| qualifiers 3rd round | Spartaks JÅ«rmala | Suduva | 2018-08-09 | 0 - 1 |
| qualifiers 2nd round | TNS | Lincoln | 2018-07-26 | 2 - 1 |
| Euro 2019 u21 qualifiers | ||||
| France u21 | Bulgaria u21 | 2017-11-09 | 3 - 0 | |
| UEFA Youth League 2017-2018 | ||||
| play-offs | Krasnodar Youth | Real Madrid Youth | 2018-02-07 | 0 - 0 |
| group stage | Liverpool Youth | Sevilla FC Youth | 2017-09-13 | 4 - 0 |
| WC 2018 qualifiers - Europe | ||||
| Gibraltar | Bosnia-Herzegovina | 2017-09-03 | 0 - 4 | |
| Champions League 2017 - 2018 | ||||
| qualifiers 2nd round | Malmö | Vardar | 2017-07-12 | 1 - 1 |
| UEFA Youth League 2016-2017 | ||||
| play-offs | Rosenborg Youth | Basel Youth | 2017-02-08 | 1 - 0 |
| Euro 2017 u19 qualifiers | ||||
| elite round | Portugal u19 | Poland u19 | 2017-03-28 | 3 - 1 |
| elite round | Poland u19 | Turkey u19 | 2017-03-23 | 1 - 0 |
| Finland u19 | Kazakhstan u19 | 2016-10-11 | 6 - 0 | |
| Russia u19 | Kazakhstan u19 | 2016-10-08 | 5 - 0 | |
| Europa League 2016 - 2017 | ||||
| qualifiers 3rd round | Torpedo Zhodino | Rapid Wien | 2016-07-28 | 0 - 0 |
| qualifiers 2nd round | Rovaniemi PS | Lokomotiva Zagreb | 2016-07-14 | 1 - 1 |
| UEFA Youth League 2015-2016 | ||||
| 2nd round | Middlesbrough Youth | Torino Youth | 2015-11-05 | 3 - 0 |
| group stage | Arsenal Youth | Olympiakos Youth | 2015-09-29 | 3 - 2 |
| Euro 2017 u21 qualifiers | ||||
| Ireland u21 | Slovenia u21 | 2016-09-02 | 2 - 0 | |
| Netherlands u21 | Cyprus u21 | 2015-09-04 | 4 - 0 | |
| Champions League 2015 - 2016 | ||||
| 1st qualifying round | Crusaders | Levadia | 2015-06-30 | 0 - 0 |
| Euro 2015 u19 qualifiers | ||||
| elite round | Bosnia-Herzegovina u19 | Poland u19 | 2015-05-19 | 2 - 0 |
| elite round | Montenegro u19 | Poland u19 | 2015-05-14 | 2 - 1 |
| Europa League 2014 - 2015 | ||||
| qualifiers 1st round | Folgore/Falciano | Buducnost Podgorica | 2014-07-03 | 1 - 2 |
| UEFA Youth League 2013-2014 | ||||
| group stage | Manchester United Youth | Shakhtar Youth | 2013-12-09 | 1 - 1 |
| Euro 2014 u17 qualifiers | ||||
| Greece u17 | Andorra u17 | 2013-10-03 | 1 - 0 | |
| Greece u17 | Estonia u17 | 2013-10-01 | 3 - 1 | |
| Champions League 2013 - 2014 | ||||
| qualifiers 2nd round | TNS | Legia Warszawa | 2013-07-17 | 1 - 3 |
| Europa League 2013 - 2014 | ||||
| qualifiers 1st round | Kruoja | Dinamo Minsk | 2013-07-04 | 0 - 3 |
| Euro 2015 u21 qualifiers | ||||
| Bosnia-Herzegovina u21 | Hungary u21 | 2014-09-08 | 1 - 4 | |
| Estonia u21 | Denmark u21 | 2013-06-07 | 0 - 1 | |
| Champions League 2012 - 2013 | ||||
| qualifiers 1st round | Tre Penne | Dudelange F91 | 2012-07-10 | 0 - 4 |
| Euro 2012 u17 qualifiers | ||||
| France u17 | Faroe Islands u17 | 2011-10-28 | 5 - 0 | |
| Euro 2013 u21 qualifiers | ||||
| Scotland u21 | Luxembourg u21 | 2012-09-06 | 3 - 0 | |
| Lithuania u21 | Ukraine u21 | 2012-06-04 | 1 - 0 | |
| Germany u21 | San Marino u21 | 2011-09-01 | 7 - 0 | |
| Europa League 2011 - 2012 | ||||
| qualifiers 1st round | Banga | Qarabag | 2011-06-30 | 0 - 4 |
| friendly | ||||
| Luxembourg | Hungary | 2011-06-03 | 0 - 1 | |
| Euro 2010 u17 qualifiers | ||||
| elite round | Georgia u17 | Netherlands u17 | 2010-03-27 | 1 - 2 |
| elite round | Netherlands u17 | Ukraine u17 | 2010-03-25 | 2 - 0 |
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