| | | | |
|  Japan |  Poland | |
|
|
RANK 33 | Yoshihito Nishioka | 6-3 6-2 | Daniel Michalski | RANK 273 |
RANK 108 | Taro Daniel | 6-3 6-4 | Kacper Zuk | RANK 255 |
| Ben McLachlan / Yosuke Watanuki | 4-6 7-5 7-6(2) | Lukasz Kubot / Jan Zielinski | |
RANK 196 | Kaichi Uchida | 6-2 7-5 | Maks Kasnikowski | RANK 383 |
RANK 273 | Daniel Michalski | NOT PLAYED | Taro Daniel | RANK 108 |
| | | | |
| | | | |
|  Greece |  Ecuador | |
|
|
RANK 3 | Stefanos Tsitsipas | 7-5 6-2 | Alvaro Guillen Meza | RANK 731 |
RANK 1578 | Aristotelis Thanos | 7-6(4) 6-4 | Andres Andrade | RANK 564 |
| Alexandros Skorilas / Petros Tsitsipas | 6-7(4) 4-6 | Gonzalo Escobar / Diego Hidalgo | |
RANK 3 | Stefanos Tsitsipas | 7-6(1) 6-1 | Andres Andrade | RANK 564 |
RANK 731 | Alvaro Guillen Meza | NOT PLAYED | Aristotelis Thanos | RANK 1578 |
| | | | |
| | | | |
|  Brazil |  China | |
|
|
RANK 212 | Matheus Pucinelli De Almeida | 6-1 6-2 | Rigele Te | RANK 568 |
RANK 78 | Thiago Monteiro | 6-3 6-4 | Jie Cui | RANK 913 |
| Rafael Matos / Felipe Meligeni Rodrigues Alves | 6-2 6-3 | Jie Cui / Ze Zhang | |
RANK 568 | Rigele Te | 0-3 RET | Gustavo Heide | RANK 414 |
RANK 212 | Matheus Pucinelli De Almeida | NOT PLAYED | Jie Cui | RANK 913 |
| | | | |
| | | | |
|  Denmark |  India | |
|
|
RANK 9 | Holger Vitus Nodskov Rune | 6-2 6-2 | Yuki Bhambri | RANK 571 |
RANK 484 | August Holmgren | 6-4 3-6 4-6 | Sumit Nagal | RANK 506 |
| Johannes Ingildsen / Holger Vitus Nodskov Rune | 6-2 6-4 | Yuki Bhambri / Rohan Bopanna | |
RANK 9 | Holger Vitus Nodskov Rune | 7-5 6-3 | Sumit Nagal | RANK 506 |
RANK 718 | Elmer Moller | 4-6 6-7(1) | Prajnesh Gunneswaran | RANK 342 |
| | | | |
| | | | |
|  Thailand |  Romania | |
|
|
RANK 976 | Yuttana Charoenphon | 7-5 3-6 6-1 | Nicholas David Ionel | RANK 225 |
RANK 605 | Kasidit Samrej | 4-6 7-6(5) 2-6 | Filip Cristian Jianu | RANK 267 |
| Pruchya Isaro / Thantub Suksumrarn | 4-6 6-2 6-4 | Marius Copil / Victor Vlad Cornea | |
RANK 225 | Nicholas David Ionel | 6-4 6-1 | Kasidit Samrej | RANK 605 |
RANK 976 | Yuttana Charoenphon | 0-6 2-6 | Filip Cristian Jianu | RANK 267 |
| | | | |
| | | | |
|  Latvia |  Israel | |
|
|
RANK 1215 | Karlis Ozolins | 6-0 6-3 | Edan Leshem | RANK 359 |
RANK 289 | Ernests Gulbis | 6-1 2-6 7-6(2) | Daniel Cukierman | RANK 367 |
| Ernests Gulbis / Karlis Ozolins | 3-6 3-6 | Daniel Cukierman / Edan Leshem | |
RANK 486 | Robert Strombachs | 1-6 4-6 | Yshai Oliel | RANK 476 |
RANK 1215 | Karlis Ozolins | 7-6(5) 2-6 4-6 | Daniel Cukierman | RANK 367 |
| | | | |
| | | | |
|  Peru |  Ireland | |
|
|
RANK 544 | Gonzalo Bueno | 6-1 6-1 | Simon Carr | RANK 738 |
RANK 491 | Arklon Huertas Del Pino | 6-2 6-3 | Osgar O'Hoisin | RANK 771 |
| Ignacio Buse / Jorge Brian Panta | 6-2 7-6(4) | Simon Carr / Jack Molloy | |
RANK 586 | Conner Huertas Del Pino | 6-3 6-4 | Michael Agwi | RANK 1218 |
RANK 544 | Gonzalo Bueno | NOT PLAYED | Osgar O'Hoisin | RANK 771 |
| | | | |
| | | | |
|  Mexico |  Chinese Taipei | |
|
|
RANK 1220 | Cesar Ramirez | 4-6 3-6 | Chun-Hsin Tseng | RANK 110 |
RANK 866 | Alan Fernando Rubio Fierros | 5-7 3-6 | Yu Hsiou Hsu | RANK 198 |
| Isaac Arturo Arevalo / Cesar Ramirez | 6-7(4) 4-6 | Yu Hsiou Hsu / Chun-Hsin Tseng | |
RANK 1220 | Cesar Ramirez | NOT PLAYED | Yu Hsiou Hsu | RANK 198 |
| | | | |
| | | | |
|  Ukraine |  Lebanon | |
|
|
| | | | |
| | | | |
|  Turkey |  Slovenia | |
|
|
RANK 205 | Altug Celikbilek | 6-2 6-3 | Sebastian Dominko | RANK 937 |
RANK 304 | Cem Ilkel | 6-2 7-6(5) | Bor Artnak | RANK 678 |
| Altug Celikbilek / Cem Ilkel | 7-5 4-6 6-4 | Sebastian Dominko / Blaz Rola | |
RANK 378 | Ergi Kirkin | 6-2 6-2 | Matic Kriznik | RANK |
RANK 937 | Sebastian Dominko | NOT PLAYED | Cem Ilkel | RANK 304 |
| | | | |
| | | | |
|  Lithuania |  Pakistan | |
|
|
RANK 193 | Ricardas Berankis | 6-0 6-2 | Muhammad Shoaib | RANK |
RANK 784 | Edas Butvilas | 6-1 6-0 | Aqeel Khan | RANK |
| Tadas Babelis / Vilius Gaubas | 1-6 6-2 6-2 | Aqeel Khan / Aisam Qureshi | |
RANK 760 | Vilius Gaubas | 6-2 6-2 | Muhammad Abid | RANK |
RANK | Muhammad Shoaib | NOT PLAYED | Edas Butvilas | RANK 784 |
| | | | |
| | | | |
|  New Zealand |  Bulgaria | |
|
|
RANK 456 | Ajeet Rai | 6-7(1) 2-6 | Alexandar Lazarov | RANK 301 |
RANK 576 | Kiranpal Pannu | 7-5 3-6 2-6 | Dimitar Kuzmanov | RANK 192 |
| Artem Sitak / Michael Venus | 6-4 3-6 6-3 | Alexander Donski / Petr Nesterov | |
RANK 456 | Ajeet Rai | 3-6 7-5 4-6 | Dimitar Kuzmanov | RANK 192 |
RANK 301 | Alexandar Lazarov | NOT PLAYED | Rubin Statham | RANK 474 |
RANK 301 | Alexandar Lazarov | NOT PLAYED | Rubin Statham | RANK 474 |
| | | | |