| Argentina (3) |
|---|
| Del Potro, Juan Martin | | Mayer, Leonardo | | Schwartzman, Diego |
| | Australien (3) |
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| De Minaur, Alex | | Ebden, Matthew | | Kyrgios, Nick |
| | | Bosnien og Herzegovina (1) |
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| Dzumhur, Damir |
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| Canada (3) |
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| Pospisil, Vasek | | Raonic, Milos | | Shapovalov, Denis |
| | | Kina (3) |
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| Li, Zhe | | Wu, Yibing | | Zhang, Ze |
| | Kroatien (2) |
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| Cilic, Marin | | Coric, Borna |
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| Frankrig (6) |
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| Chardy, Jeremy | | Gasquet, Richard | | Mannarino, Adrian | | Monfils, Gael | | Paire, Benoit | | Simon, Gilles |
| | Georgien (1) |
|---|
| Basilashvili, Nikoloz |
| | Tyskland (4) |
|---|
| Gojowczyk, Peter | | Marterer, Maximilian | | Zverev, Alexander | | Zverev, Mischa |
| | Grækenland (1) |
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| Tsitsipas, Stefano |
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| Ungarn (1) |
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| Fucsovics, Marton |
| | Italien (2) |
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| Cecchinato, Marco | | Seppi, Andreas |
| | | Kasakhstan (1) |
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| Kukushkin, Mikhail |
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| | | Rusland (3) |
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| Khachanov, Karen | | Medvedev, Daniil | | Rublev, Andrey |
| | Serbien (2) |
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| Djokovic, Novak | | Krajinovic, Filip |
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| Sydafrika (1) |
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| Anderson, Kevin |
| | | Spanien (3) |
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| Bautista Agut, Roberto | | Carreno Busta, Pablo | | Ramos-Vinolas, Albert |
| | Schweizisk (2) |
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| Federer, Roger | | Wawrinka, Stan |
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| Storbritannien (1) |
|---|
| Edmund, Kyle |
| | USA (7) |
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| Fritz, Taylor | | Johnson, Steve | | Klahn, Bradley | | McDonald, Mackenzie | | Querrey, Sam | | Sock, Jack | | Tiafoe, Frances |
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