| Argentyna (1) |
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| Mayer, Leonardo |
| | Australia (3) |
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| Ebden, Matthew | | Millman, John | | Popyrin, Alexei |
| | Kanada (1) |
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| Shapovalov, Denis |
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| Chorwacja (1) |
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| Cilic, Marin |
| | Francja (3) |
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| Chardy, Jeremy | | Mannarino, Adrian | | Simon, Gilles |
| | Niemcy (4) |
|---|
| Gojowczyk, Peter | | Marterer, Maximilian | | Struff, Jan-Lennard | | Zverev, Alexander |
| | Grecja (1) |
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| Tsitsipas, Stefano |
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| Włochy (2) |
|---|
| Cecchinato, Marco | | Seppi, Andreas |
| | | |
| Portugalia (1) |
|---|
| Sousa, Joao |
| | | Rosja (1) |
|---|
| Medvedev, Daniil |
| | Serbia (3) |
|---|
| Djere, Laslo | | Krajinovic, Filip | | Lajovic, Dusan |
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| Hiszpania (1) |
|---|
| Bautista Agut, Roberto |
| | Switzerland (3) |
|---|
| Federer, Roger | | Laaksonen, Henri | | Wawrinka, Stan |
| | Stany Zjednoczone (3) |
|---|
| Fritz, Taylor | | Harrison, Ryan | | Sock, Jack |
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