| Argentina (1) |
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| Schwartzman, Diego |
| | Østrig (3) |
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| Melzer, Jurgen | | Novak, Dennis | | Thiem, Dominic |
| | Belgien (1) |
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| Bemelmans, Ruben |
| | Bosnien og Herzegovina (1) |
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| Dzumhur, Damir |
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| Bulgarien (1) |
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| Dimitrov, Grigor |
| | Canada (2) |
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| Auger-Aliassime, Felix | | Raonic, Milos |
| | | Frankrig (4) |
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| Herbert, Pierre-Hugues | | Monfils, Gael | | Pouille, Lucas | | Tsonga, Jo-Wilfried |
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| Georgien (1) |
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| Basilashvili, Nikoloz |
| | Tyskland (1) |
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| Kohlschreiber, Philipp |
| | Ungarn (1) |
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| Fucsovics, Marton |
| | Italien (1) |
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| Fognini, Fabio |
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| | Kasakhstan (1) |
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| Kukushkin, Mikhail |
| | Rusland (2) |
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| Khachanov, Karen | | Rublev, Andrey |
| | Sydafrika (1) |
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| Anderson, Kevin |
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| Spanien (2) |
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| Ramos-Vinolas, Albert | | Verdasco, Fernando |
| | Storbritannien (2) |
|---|
| Edmund, Kyle | | Norrie, Cameron |
| | USA (5) |
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| Isner, John | | Johnson, Steve | | Kudla, Denis | | Querrey, Sam | | Tiafoe, Frances |
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