Geoffrey Schlammes ha enfrentado a 47 oponentes a lo largo de su carrera.

Player Team(s) Games
Jayden Anike
U16 Netherlands (Euro U16 B)
1
Lazar Bajceta
U16 Montenegro (Euro U16 B)
1
Marko Bardic
U16 Montenegro (Euro U16 B)
1
Jesper Beelen
U16 Netherlands (Euro U16 B)
1
Skye Bergens
U16 Netherlands (Euro U16 B)
1
Elias Besana
U16 Netherlands (Euro U16 B)
1
Krystof Brezik 1
Maksim Brnovic
U16 Montenegro (Euro U16 B)
1
Jan Broda 1
Matej Buben 1
Lex Caverle
U16 Netherlands (Euro U16 B)
1
Marinos Christophi
U16 Cyprus (Euro U16 B)
1
Kyriacos Constantinou
U16 Cyprus (Euro U16 B)
1
Krystof Davidek 1
Djordje Djukanovic
U16 Montenegro (Euro U16 B)
1
Savvas Foullides
U16 Cyprus (Euro U16 B)
1
Miodrag Gasic
U16 Montenegro (Euro U16 B)
1
Ioannis Georgiou
U16 Cyprus (Euro U16 B)
1
Sadik Golubovic
U16 Netherlands (Euro U16 B)
1
Vuk Ivelja
U16 Montenegro (Euro U16 B)
1
Sofianos Koutsides
U16 Cyprus (Euro U16 B)
1
Alexandr Krob 1
Nai-Yahrell Leeuwin
U16 Netherlands (Euro U16 B)
1
Charis Mastoris
U16 Cyprus (Euro U16 B)
1
Nathan Messele 1
Jaksa Mickovic
U16 Montenegro (Euro U16 B)
1
Artem Mikheev
U16 Cyprus (Euro U16 B)
1
Savvas Milinkovic
U16 Cyprus (Euro U16 B)
1
Balsa Mugosa
U16 Montenegro (Euro U16 B)
1
Constantinos Nicolaou
U16 Cyprus (Euro U16 B)
1
Samuel Nohel 1
Vaclav Nosek 1
Viktor Novak 1
Andreas Oikonomou
U16 Cyprus (Euro U16 B)
1
Marko Popovic
U16 Montenegro (Euro U16 B)
1
Ondrej Pospichal 1
Vuk Radovic
U16 Montenegro (Euro U16 B)
1
Mstislav Reinten
U16 Netherlands (Euro U16 B)
1
Lukas Sadovsky 1
Yanu Slingerland
U16 Netherlands (Euro U16 B)
1
Giorgos Adamos Solomou
U16 Cyprus (Euro U16 B)
1
Dusan Stankovic
U16 Montenegro (Euro U16 B)
1
Milos Vekovic
U16 Montenegro (Euro U16 B)
1
Jakub Zalud 1
Antreas Zinonos
U16 Cyprus (Euro U16 B)
1
Tristan van Brandwijk
U16 Netherlands (Euro U16 B)
1
Teun van der Heijden
U16 Netherlands (Euro U16 B)
1