Guillermo Dekker ha enfrentado a 81 oponentes a lo largo de su carrera.

Player Team(s) Games
Roope Ahonen
U18 Finland (Euro U18 B)
1
Keith Anderson
U18 Ireland (Euro U18 B)
1
Stanislav Baldovsky 1
Mesrop Barseghyan
U18 Armenia (Euro U18 B)
1
Darren Callanan
U18 Ireland (Euro U18 B)
1
Rory Connolly
U18 Ireland (Euro U18 B)
1
Patrick Csar
U18 Austria (Euro U18 B)
2
Thomas Csebits
U18 Austria (Euro U18 B)
2
Max Dahlman
U18 Finland (Euro U18 B)
1
Davit Davtyan
U18 Armenia (Euro U18 B)
1
Nicolas Dolenc
U18 Finland (Euro U18 B)
1
Peter Dorazil 1
Mario Drazic
U18 Sweden (Euro U18 B)
1
Tomas Durana 1
Craig Edmonds
U18 Ireland (Euro U18 B)
1
Anton Gaddefors
U18 Sweden (Euro U18 B)
1
Armen Gmiruk
U18 Armenia (Euro U18 B)
1
Daniel Goldammer
U18 Poland (Euro U18 B)
1
Christoph Greimeister
U18 Austria (Euro U18 B)
2
Karol Gruszecki
U18 Poland (Euro U18 B)
1
Tigran Hakobyan
U18 Armenia (Euro U18 B)
1
Arman Hakobyan
U18 Armenia (Euro U18 B)
1
Juraj Hasan 1
Alexander Heuberger
U18 Austria (Euro U18 B)
2
Michael Higgins
U18 Ireland (Euro U18 B)
1
Sami Himberg
U18 Finland (Euro U18 B)
1
Lukas Hoferica 1
David Hult
U18 Sweden (Euro U18 B)
1
Daniel James
U18 Ireland (Euro U18 B)
1
Juhani Jamsa
U18 Finland (Euro U18 B)
1
Michael Janisch
U18 Austria (Euro U18 B)
2
Marek Jass 1
Antti Kanervo
U18 Finland (Euro U18 B)
1
Andreas Karlsson
U18 Sweden (Euro U18 B)
1
Harri Keskitalo
U18 Finland (Euro U18 B)
1
Sean Kilmartin
U18 Ireland (Euro U18 B)
1
Mateusz Kostrzewski
U18 Poland (Euro U18 B)
1
Boris Kovalik 1
Krzysztof Krajniewski
U18 Poland (Euro U18 B)
1
Miroslav Kral 1
Kevin Lacey
U18 Ireland (Euro U18 B)
1
Moritz Lanegger
U18 Austria (Euro U18 B)
2
Juho Lehtoranta
U18 Finland (Euro U18 B)
1
James Loughnane
U18 Ireland (Euro U18 B)
1
Rasid Mahalbasic
U18 Austria (Euro U18 B)
2
Michal Maslik 1
Gevorg Mayilyan
U18 Armenia (Euro U18 B)
1
Aramayis Mayilyan
U18 Armenia (Euro U18 B)
1
Dara McKeon
U18 Ireland (Euro U18 B)
1
Mark Mitchell
U18 Ireland (Euro U18 B)
1
Jaroslaw Mokros
U18 Poland (Euro U18 B)
1
Artem Mushegyan
U18 Armenia (Euro U18 B)
1
Kassim Nagwere
U18 Sweden (Euro U18 B)
1
Andranik Novents
U18 Armenia (Euro U18 B)
1
Marcin Nowakowski
U18 Poland (Euro U18 B)
1
Matti Nuutinen
U18 Finland (Euro U18 B)
1
Alan O'brien
U18 Ireland (Euro U18 B)
1
Hannes Obermann
U18 Austria (Euro U18 B)
2
Kevin Okot
U18 Sweden (Euro U18 B)
1
Piotr Pamula
U18 Poland (Euro U18 B)
1
Ilpo Pehkonen
U18 Finland (Euro U18 B)
1
Alexander Pettersson
U18 Sweden (Euro U18 B)
1
Maros Repasky 1
Johan Roenstrom
U18 Sweden (Euro U18 B)
1
Anton Saks
U18 Sweden (Euro U18 B)
1
Sebastian Schaal
U18 Austria (Euro U18 B)
2
Eric Schranz
U18 Austria (Euro U18 B)
2
Jesse Seilern
U18 Austria (Euro U18 B)
2
Aleksandr Simonyants
U18 Armenia (Euro U18 B)
1
Dusan Skuban 1
Piotr Smigielski
U18 Poland (Euro U18 B)
1
Tomasz Snieg
U18 Poland (Euro U18 B)
1
Jeffery Taylor
U18 Sweden (Euro U18 B)
1
Anton Telih
U18 Finland (Euro U18 B)
1
Toivo Albert Virtanen
U18 Finland (Euro U18 B)
1
Adam Waczynski
U18 Poland (Euro U18 B)
1
Matthias Weissl
U18 Austria (Euro U18 B)
1
Jakub Wojciechowski
U18 Poland (Euro U18 B)
1
Piotr Wojdyr
U18 Poland (Euro U18 B)
1
Omar Zaghdene
U18 Sweden (Euro U18 B)
1
Miroslav Zilik 1