Fabio Fognini
Maximilian Marterer
Thomaz Bellucci
Mikhail Youzhny
Jan-Lennard Struff
Vasek Pospisil
Alexander Zverev
Malek Jaziri
Lukas Rosol
Denis Istomin
Mikhail Kukushkin
Evgeny Donskoy
Ivan Dodig
Ernests Gulbis
Victor Estrella Burgos
Cedrik-Marcel Stebe
Igor Sijsling
Marco Cecchinato
Santiago Giraldo
Mischa Zverev
Juan Martin del Potro
Dustin Brown
Florian Mayer
Matthias Bachinger