Albot, Radu (MDA)
Baghdatis, Marcos (CYP)
Basilashvili, Nikoloz (GEO)
Bemelmans, Ruben (BEL) Q
Berrettini, Matteo (ITA)
Chung, Hyeon (KOR)
Donskoy, Evgeny (RUS)
Ebden, Matthew (AUS)
Felix Auger-Aliassime (CAN) LL
Fognini, Fabio (ITA)
Fritz, Taylor (USA)
Gunneswaran, Prajnesh (IND) Q
Harris, Lloyd (RSA) Q
Jaziri, Malek (TUN)
Klahn, Bradley (USA)
Kukushkin, Mikhail (KAZ)
Mannarino, Adrian (FRA)
Monfils, Gael (FRA)
Pella, Guido (ARG)
Pospisil, Vasek (CAN)
Querrey, Sam (USA)
Sandgren, Tennys (USA)
Smyczek, Tim (USA)
Sousa, Joao (POR)
Tomic, Bernard (AUS) Q
Tseng, Chun Hsin (TPE) WC
Wu, Yibing (CHN) WC
Zverev, Mischa (GER)