| Austria (3) |
|---|
| Novak, Dennis | | Rodionov, Jurij | | Thiem, Dominic |
| | Bulgaria (1) |
|---|
| Dimitrov, Grigor |
| | Canadá (3) |
|---|
| Auger-Aliassime, Felix | | Pospisil, Vasek | | Shapovalov, Denis |
| | Chile (1) |
|---|
| Garin, Christian |
|
| | | Alemania (1) |
|---|
| Struff, Jan-Lennard |
| | Grecia (1) |
|---|
| Tsitsipas, Stefano |
|
| Hungría (1) |
|---|
| Balazs, Attila |
| | Italia (2) |
|---|
| Sinner, Jannik | | Sonego, Lorenzo |
| | |
| Polonia (1) |
|---|
| Hurkacz, Hubert |
| | Rusia (3) |
|---|
| Khachanov, Karen | | Medvedev, Daniil | | Rublev, Andrey |
| | Serbia (3) |
|---|
| Djokovic, Novak | | Krajinovic, Filip | | Lajovic, Dusan |
| | Eslovaquia (1) |
|---|
| Gombos, Norbert |
|
| Eslovenia (1) |
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| Anderson, Kevin |
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|---|
| Carreno Busta, Pablo |
| |
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| Sachko, Vitaliy |
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|---|
| Evans, Daniel |
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| Fritz, Taylor |
|