1-Marcelo Arevalo ESA/Mate Pavic CRO
vs WC-Rinky Hijikata AUS/Jason Kubler AUS
Cameron Norrie GBR/Marcus Willis GBR
vs Gonzalo Escobar ECU/John-Patrick Smith AUS
Pablo Carreno Busta ESP/Sergio Martos Gornes ESP
vs Sander Arends NED/Luke Johnson GBR
Petr Nouza CZE/Patrik Rikl CZE
vs 16-Sadio Doumbia FRA/Fabien Reboul FRA
10-Joe Salisbury GBR/Neal Skupski GBR
vs Sebastian Baez ARG/Francisco Comesana ARG
Andre Goransson SWE/Sem Verbeek NED
vs Alexander Erler AUT/Andreas Mies GER
James Duckworth AUS/Aleksandar Vukic AUS
vs Thanasi Kokkinakis AUS/Nick Kyrgios AUS
WC-Luke Saville AUS/Li Tu AUS
vs 8-Maximo Gonzalez ARG/Andres Molteni ARG
........................................................................
3-Simone Bolelli ITA/Andrea Vavassori ITA
vs Constantin Frantzen GER/Hendrik Jebens GER
Marco Bortolotti ITA/ Flavio Cobolli ITA
vs Luciano Darderi ITA/Diego Hidalgo ECU
Adam Pavlasek CZE/Jean-Julien Rojer NED
vs Romain Arneodo MON/Arthur Cazaux FRA
Pedro Martinez ESP/Jaume Munar ESP
vs 14-Nicolas Barrientos COL/Rohan Bopanna IND
12-Jamie Murray GBR/John Peers AUS
vs Borna Gojo CRO/Miomir Kecmanovic SRB
Tallon Griekspoor NED/Botic van de Zandschulp NED
vs Christopher O'Connell AUS/Roman Safiullin RUS
N.Sriram Balaji IND/Miguel Reyes-Varela MEX
vs Aleksandr Nedovyesov/Robin Haase NED
Nuno Borges POR/Francisco Cabral POR
vs 5-Nikola Mektic CRO/Michael Venus NZL
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7-Nathaniel Lammons USA/Jackson Withrow USA
vs Marcos Giron USA/Evan King USA
Alexander Bublik KAZ/Alexander Shevchenko KAZ
vs Ariel Beha URU/Robert Galloway USA
Santiago Gonzalez MEX/Lucas Miedler AUT
vs WC-Seita Watanabe JPN/Takeru Yuzuki JPN
Francisco Cerundolo ARG/Tomas Martin Etcheverry ARG
vs 11-Julian Cash GBR/Lloyd Glasspool GBR
13-Sander Gille BEL/Jan Zielinski POL
vs 布雲朝克特 Yunchaokete Bu CHN/Roberto Carballes Baena ESP
Gregoire Jacq FRA/Orlando Luz BRA
vs WC-Vasek Pospisil CAN/Jordan Thompson AUS
Christian Harrison USA/David Pel NED
vs Victor Cornea ROU/Mariano Navone ARG
David Goffin BEL/Alexandre Muller FRA
vs 4-Kevin Krawietz GER/Tim Puetz GER
........................................................................
6-Harri Heliovaara FIN/Henry Patten GBR
vs Rithvik Choudary Bollipalli IND/Ryan Seggerman USA
WC-Marc Polmans AUS/Matthew Romios AUS
vs Manuel Guinard FRA/Arthur Rinderknech FRA
Yuki Bhambri IND/Albano Olivetti FRA
vs WC-Tristan Schoolkate AUS/Adam Walton AUS
Austin Krajicek USA/Rajeev Ram USA
vs 9-Matthew Ebden AUS/Joran Vliegen BEL
15-Hugo Nys MON/Edouard Roger-Vasselin FRA
vs Rafael Matos BRA/Marcelo Melo BRA
Ivan Dodig CRO/Skander Mansouri TUN
vs WC-Blake Ellis AUS/Thomas Fancutt AUS
Tomas Machac CZE/張之臻 Zhizhen Zhang CHN
vs Guido Andreozzi ARG/Theo Arribage FRA
Jakob Schnaitter GER/Mark Wallner GER
vs 2-Marcel Granollers ESP/Horacio Zeballos ARG