Seong Chan Hong @ Challenger Phoenix

Matteo Berrettini Mikhail Kukushkin Denis Kudla Jan-Lennard Struff David Goffin Roman Safiullin Richard Gasquet Taro Daniel Elias Ymer Radu Albot Mats Moraing Guido Andreozzi Lorenzo Sonego Evgeny Donskoy John Millman Yasutaka Uchiyama Fernando Verdasco Kei Nishikori Mikael Ymer Roberto Carballes Baena Lukas Lacko Andrea Arnaboldi Maximilian Marterer Fabio Fognini Thomas Fabbiano Ilya Ivashka Bjorn Fratangelo Daniel Evans Dominik Kellovsky Ryan Harrison Daniel Elahi Galan Vit Kopriva Ramkumar Ramanathan Diego Schwartzman Damir Dzumhur Sebastian Ofner Joao Sousa Jurij Rodionov Seong Chan Hong Marco Cecchinato Andrey Kuznetsov Ernesto Escobedo James Duckworth Go Soeda Jeremy Chardy Michael Mmoh Adrian Mannarino Marc-Andrea Huesler Lloyd Harris Lukas Rosol