Boris Butulija @ Challenger Belgrade

Damir Dzumhur Roberto Carballes Baena Liam Broady Jozef Kovalik Marco Trungelliti Facundo Bagnis Taro Daniel Elliot Benchetrit Brandon Nakashima Blaz Rola Matthias Bachinger Federico Gaio Marius Copil Alessandro Giannessi Dmitry Popko Philipp Kohlschreiber Hugo Dellien Andrej Martin Sebastian Ofner Hamad Medjedovic Maxime Janvier John-Patrick Smith Daniel Elahi Galan Marko Miladinovic Boris Butulija Francisco Cerundolo Igor Sijsling Maxime Cressy Arthur Rinderknech Marko Tepavac Benjamin Bonzi Antoine Hoang Danilo Petrovic Tallon Griekspoor Pedja Krstin Nikola Milojevic Oscar Otte Malek Jaziri Evgeny Donskoy Viktor Troicki Andrea Arnaboldi Jurij Rodionov Marko Topo