Sigurdur Thorsteinsson ha enfrentado a 68 oponentes a lo largo de su carrera.

Player Team(s) Games
Imad Anwoir
U16 Belgium (Euro U16)
1
Uladzislau Bantsevich
U16 Belarus (Euro U16)
1
Daniil Barysevich
U16 Belarus (Euro U16)
1
Damjan Boshkovski 1
Benjamin Bosmans-Verdonk
U16 Belgium (Euro U16)
1
Haris Bratanovic
U16 Belgium (Euro U16)
1
Mihai Carcoana
U16 Romania (Euro U16)
1
Cristian Cotoara
U16 Romania (Euro U16)
1
Niels De Ridder
U16 Belgium (Euro U16)
1
Laurentiu Dimitrescu
U16 Romania (Euro U16)
1
Marian Duica
U16 Romania (Euro U16)
1
Joel Ekamba-Ey'oombe
U16 Belgium (Euro U16)
1
Emmanuel Fundi Bin Musemana
U16 Belgium (Euro U16)
1
Constantin Gavriloaia
U16 Romania (Euro U16)
1
Slav Georgiev
U16 Bulgaria (Euro U16)
1
Stefan Grasu
U16 Romania (Euro U16)
1
Emilian Grudov
U16 Bulgaria (Euro U16)
1
Raman Hests
U16 Belarus (Euro U16)
1
Nikola Hristov 1
Nicolas Hulliger 1
Viktor Isajloski 1
Nikolay Ivanov
U16 Bulgaria (Euro U16)
1
Andrej Jakimovski 1
Angel Janev 1
Micky Jean-Philippe
U16 Belgium (Euro U16)
1
Haris Jusovic 1
Konstantin Kostadinov
U16 Bulgaria (Euro U16)
1
Nikita Lagun
U16 Belarus (Euro U16)
1
Luka Langura 1
Noe Lugt 1
Tudor Lungu
U16 Romania (Euro U16)
1
Kevin Martina 1
Jan Marynin
U16 Belarus (Euro U16)
1
Nikita Matsal
U16 Belarus (Euro U16)
1
Saban Mehic 1
Marko Milovanovikj 1
Tomislav Minkov
U16 Bulgaria (Euro U16)
1
Dario Mitevski 1
Mihail Moldov
U16 Bulgaria (Euro U16)
1
Marco Mouron Barba 1
Luan Murati 1
Adrian Naumoski 1
Luka Naumovski 1
Aliaksei Navoichyk
U16 Belarus (Euro U16)
1
Paolo Nicolet 1
Nikola Orlov 1
Bogdan Penciu
U16 Romania (Euro U16)
1
Radu Radulescu
U16 Romania (Euro U16)
1
Thomas Salman 1
Artem Sekushenko
U16 Belarus (Euro U16)
1
Ernest Shundryk
U16 Belarus (Euro U16)
1
Aron Solca 1
Ilia Stefanov
U16 Bulgaria (Euro U16)
1
Emil Stoilov
U16 Bulgaria (Euro U16)
1
Aleksandar Stoimenov
U16 Bulgaria (Euro U16)
1
Aleksandar Stoykov
U16 Bulgaria (Euro U16)
1
Stephan D. Swenson
U16 Belgium (Euro U16)
1
Diego Togninalli 1
Kiryl Tsetserukou
U16 Belarus (Euro U16)
1
Godwin Tshimanga
U16 Belgium (Euro U16)
1
Alex Tsynkevich
U16 Belarus (Euro U16)
1
Alexandru Unitu
U16 Romania (Euro U16)
1
Tudor Valeanu
U16 Romania (Euro U16)
1
Thomas Van Hille
U16 Belgium (Euro U16)
1
Ferre Vanderhoydonck
U16 Belgium (Euro U16)
1
Luca Vasile
U16 Romania (Euro U16)
1
Aaron Verstraete
U16 Belgium (Euro U16)
1
Aleksandar Vitanov
U16 Bulgaria (Euro U16)
1