(1)John Millman vs Tim Smyczek
Michael Mmoh vs (13)Mirza Basic
(2)Ryan Harrison vs Hubert Hurkacz
Ivo Karlovic vs (12)Taro Daniel
(3)Malek Jaziri vs (WC)Bjorn Fratangelo
Evgeny Donskoy vs (11)Denis Kudla
(4)Tennys Sandgren vs Bradley Klahn
Ricardas Berankis vs (9)Guillermo Garcia-Lopez
(5)Dusan Lajovic vs (WC)Mitchell Krueger
Marcos Baghdatis vs (8)Feliciano Lopez
(6)Cameron Norrie vs Marius Copil
(WC)Jeffrey John Wolf vs (14)Jozef Kovalik
(7)Daniil Medvedev vs (WC)Christian Harrison
(PR)Yoshihito Nishioka vs (10)Yuichi Sugita
