| Argentina (2) |
|---|
| Bagnis, Facundo | | Delbonis, Federico |
| | Australia (3) |
|---|
| Kokkinakis, Thanasi | | Millman, John | | O'Connell, Christopher |
| | Austria (1) |
|---|
| Thiem, Dominic |
| |
| Canada (1) |
|---|
| Shapovalov, Denis |
| | Finland (1) |
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| Ruusuvuori, Emil |
| | France (2) |
|---|
| Gasquet, Richard | | Paire, Benoit |
| | Georgia (1) |
|---|
| Basilashvili, Nikoloz |
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| Italy (2) |
|---|
| Cecchinato, Marco | | Fognini, Fabio |
| | Kazakhstan (1) |
|---|
| Bublik, Alexander |
| | Lithuania (1) |
|---|
| Berankis, Ricardas |
| | Netherlands (1) |
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| Griekspoor, Tallon |
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| | Poland (1) |
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| Majchrzak, Kamil |
| | | Russia (1) |
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| Medvedev, Daniil |
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| Spain (2) |
|---|
| Andujar, Pablo | | Ramos-Vinolas, Albert |
| | Switzerland (2) |
|---|
| Nikles, Johan | | Riedi, Leandro |
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|---|
| Giron, Marcos | | Opelka, Reilly | | Paul, Tommy |
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