Gianni Fiermans ha enfrentado a 152 oponentes a lo largo de su carrera.

Player Team(s) Games
Eyup Aydogan
U16 Turkey (Euro U16)
1
Dogus Balbay
U16 Turkey (Euro U16)
1
Stefan Balmazovic 1
Krystian Bartkowiak
U16 Poland (Euro U16)
1
Birkan Batuk
U16 Turkey (Euro U16)
1
Sinisa Bilic
U16 Slovenia (Euro U16)
1
Giorgos Bogris
U16 Greece (Euro U16)
1
Damian Cantrell 1
Petar Cecur 1
Alexey Chigrinov
U18 Ukraine (Euro U18 B)
1
Vladimir Cizmovic
U18 Montenegro (Euro U18 B)
1
Sean Daniel
U16 Israel (Euro U16)
1
Tremmell Darden 1
Piet De Bel 1
Maxime De Zeeuw 1
Nikola Djokovic
U18 Montenegro (Euro U18 B)
1
Stefan Djordjevic 1
Roman Dmytrenko
U18 Ukraine (Euro U18 B)
1
Zoran Dragic
U16 Slovenia (Euro U16)
1
Igor Dranchenko
U18 Ukraine (Euro U18 B)
U16 Ukraine (Euro U16)
2
Mario Drazic
U18 Sweden (Euro U18 B)
1
Jaka Drenik
U16 Slovenia (Euro U16)
1
Helgi Einarsson
U16 Iceland (Euro U16)
1
Hjortur Einarsson
U16 Iceland (Euro U16)
1
Sahin Ekmen
U16 Turkey (Euro U16)
1
Runar Erlingsson
U16 Iceland (Euro U16)
1
Lior Fest
U16 Israel (Euro U16)
1
Olivier Foucart 1
Anton Gaddefors
U18 Sweden (Euro U18 B)
1
Gokper Gen
U16 Turkey (Euro U16)
1
Charis Giannopoulos
U16 Greece (Euro U16)
1
Daniel Goldammer
U18 Poland (Euro U18 B)
1
Grzegorz Golucki
U16 Poland (Euro U16)
1
Hen Gonshor
U16 Israel (Euro U16)
1
Pablo Gonzales 1
Karol Gruszecki
U18 Poland (Euro U18 B)
U16 Poland (Euro U16)
2
Antonios Gryllis
U16 Greece (Euro U16)
1
Alican Guney
U16 Turkey (Euro U16)
1
Justin Hamilton 1
DeAndre Haynes 1
Pall Helgason
U16 Iceland (Euro U16)
1
Nathan Hervelle 1
Geoffrey Hockins 1
Atli Hreinsson
U16 Iceland (Euro U16)
1
Vojtech Hruban 1
Trevor Huffman 1
David Hult
U18 Sweden (Euro U18 B)
1
Simeon Ioakimidis
U16 Greece (Euro U16)
1
Nikola Ivanovic
U18 Montenegro (Euro U18 B)
1
Josiah James 1
Nikola Janjusevic
U16 Turkey (Euro U16)
1
David Jelinek 1
Throstur Leo Johannsson
U16 Iceland (Euro U16)
1
Jerry Johnson 1
Dimitri Jorssen 1
David Kalut 1
Almog efraim Karlinsky
U16 Israel (Euro U16)
1
Andreas Karlsson
U18 Sweden (Euro U18 B)
1
Alexandros Kelesidis
U16 Greece (Euro U16)
1
Matic Korosec
U16 Slovenia (Euro U16)
1
Krzysztof Krajniewski
U18 Poland (Euro U18 B)
1
Jakub Krakovic 1
Petros Krasopoulos
U16 Greece (Euro U16)
1
Elias Kristjansson
U16 Iceland (Euro U16)
1
Jakub Kudlacek 1
Dariusz Kusper
U16 Poland (Euro U16)
1
Kamil Laczynski
U16 Poland (Euro U16)
1
Nikola Lalic
U18 Montenegro (Euro U18 B)
2
Michal Latos
U16 Poland (Euro U16)
1
Andriy Lebedintsev
U16 Ukraine (Euro U16)
1
Charles Lee 1
Matt Lojeski 1
Milos Lopicic
U18 Montenegro (Euro U18 B)
1
Igor Lutersek
U18 Montenegro (Euro U18 B)
1
Milan Macvan 1
Nikola Maravic 1
Shahar Margulis
U16 Israel (Euro U16)
1
Marios Matalon
U16 Greece (Euro U16)
1
Leonard Matela 1
Jakub Mikulec 1
Dejan Milasinovic
U16 Slovenia (Euro U16)
1
Jaroslaw Mokros
U18 Poland (Euro U18 B)
1
Roel Moors 1
Lubos Moravec 1
Pawel Mowlik
U16 Poland (Euro U16)
1
Klemen Muha
U16 Slovenia (Euro U16)
1
Dino Muric
U16 Slovenia (Euro U16)
1
Kassim Nagwere
U18 Sweden (Euro U18 B)
1
Andriy Novikov
U18 Ukraine (Euro U18 B)
U16 Ukraine (Euro U16)
2
Marcin Nowakowski
U18 Poland (Euro U18 B)
1
Teoman Orge
U16 Turkey (Euro U16)
1
Ruslan Otverchenko
U18 Ukraine (Euro U18 B)
1
Can Ozcan
U16 Turkey (Euro U16)
1
Lukas Palyza 1
Piotr Pamula
U18 Poland (Euro U18 B)
1
Jan Pawlak
U16 Poland (Euro U16)
1
Jernej Pesic
U16 Slovenia (Euro U16)
1
Alexander Pettersson
U18 Sweden (Euro U18 B)
1
Theocharis Plioukas
U16 Greece (Euro U16)
1
Ivan Polyezhayev
U18 Ukraine (Euro U18 B)
U16 Ukraine (Euro U16)
2
Eric Poole 1
Aleksandr Riabchuk
U16 Ukraine (Euro U16)
1
Andre Riddick 1
Johan Roenstrom
U18 Sweden (Euro U18 B)
1
Anastasios Roumeliotis
U16 Greece (Euro U16)
1
Anton Saks
U18 Sweden (Euro U18 B)
1
Zisis Sarikopoulos
U16 Greece (Euro U16)
1
Milos Savovic
U18 Montenegro (Euro U18 B)
1
Sead Sehovic
U18 Montenegro (Euro U18 B)
1
Olexiy Shchepkin
U18 Ukraine (Euro U18 B)
U16 Ukraine (Euro U16)
2
Earnest Shelton 1
Anton Shestak
U18 Ukraine (Euro U18 B)
U16 Ukraine (Euro U16)
2
Anton Shoutvin
U16 Israel (Euro U16)
1
Sebastian Silbermann
U16 Israel (Euro U16)
1
Amit Simhon
U16 Israel (Euro U16)
1
Adam Sinai
U16 Israel (Euro U16)
1
Andrei catali Sirbu
U16 Turkey (Euro U16)
1
Gasper Skok
U16 Slovenia (Euro U16)
1
Jiri Slavik 1
Piotr Smigielski
U18 Poland (Euro U18 B)
1
Ivan Smiljanic 1
Tomasz Snieg
U18 Poland (Euro U18 B)
1
Eyal Solomoviz
U16 Israel (Euro U16)
1
Jan Spacek 1
Stefan Stojacic 1
Loren Stokes 1
Timotej Strlic
U16 Slovenia (Euro U16)
1
Jonathan Tabu 1
Aris Tatarounis
U16 Greece (Euro U16)
1
Jeffery Taylor
U18 Sweden (Euro U18 B)
1
Nikoloas Theodorakos
U16 Greece (Euro U16)
1
Oleksandr Tischenko
U18 Ukraine (Euro U18 B)
1
Vladyslav Tonchenko
U16 Ukraine (Euro U16)
1
Igor Trela
U16 Poland (Euro U16)
1
Stanislav Tymofeyenko
U18 Ukraine (Euro U18 B)
1
Milojko Vasilic 1
Jan Vesely 1
Jakob Virk
U16 Slovenia (Euro U16)
1
Daniel Vujasinovic
U16 Slovenia (Euro U16)
1
Milan Vukelic
U18 Montenegro (Euro U18 B)
1
Adam Waczynski
U18 Poland (Euro U18 B)
1
Matt Walsh 1
Wesley Wilkinson 1
Roi Wittenshtein
U16 Israel (Euro U16)
1
Jakub Wojciechowski
U18 Poland (Euro U18 B)
U16 Poland (Euro U16)
2
Piotr Wojdyr
U18 Poland (Euro U18 B)
1
Ibrahim Yildirim
U16 Turkey (Euro U16)
1
Omar Zaghdene
U18 Sweden (Euro U18 B)
1
Ihor Zaytsev
U18 Ukraine (Euro U18 B)
1
Aleksandar Zecevic 1
Or david Zinderman
U16 Israel (Euro U16)
1
Stefan Zivanovic 1