| Argentinien (2) |
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| Coria, Federico | | Etcheverry, Tomas Martin |
| | Australien (5) |
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| Duckworth, James | | Kokkinakis, Thanasi | | Kubler, Jason | | Millman, John | | O'Connell, Christopher |
| | Österreich (1) |
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| Thiem, Dominic |
| | Weißrussland (1) |
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| Ivashka, Ilya |
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| | Brasilien (1) |
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| Monteiro, Thiago |
| | Bulgarien (1) |
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| Dimitrov, Grigor |
| | Chile (1) |
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| Tabilo, Alejandro |
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| Tschechien (1) |
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| Lehecka, Jiri |
| | Finnland (1) |
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| Ruusuvuori, Emil |
| | Frankreich (4) |
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| Bonzi, Benjamin | | Gasquet, Richard | | Gaston, Hugo | | Mannarino, Adrian |
| | Georgien (1) |
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| Basilashvili, Nikoloz |
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| Deutschland (2) |
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| Altmaier, Daniel | | Gojowczyk, Peter |
| | Griechenland (1) |
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| Pervolarakis, Michail |
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| Fucsovics, Marton |
| | Italien (3) |
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| Fognini, Fabio | | Musetti, Lorenzo | | Sonego, Lorenzo |
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| Japan (2) |
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| Daniel, Taro | | Mochizuki, Shintaro |
| | Die Niederlande (2) |
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| Griekspoor, Tallon | | Zandschulp, Botic van de |
| | Polen (1) |
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| Majchrzak, Kamil |
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| Serbien (2) |
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| Djere, Laslo | | Lajovic, Dusan |
| | Südkorea (1) |
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| Kwon, Soonwoo |
| | Spanien (3) |
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| Martinez, Pedro | | Munar, Jaume | | Ramos-Vinolas, Albert |
| |
| Schweiz (1) |
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| Huesler, Marc-Andrea |
| | Taiwan (1) |
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| Tseng, Chun-Hsin |
| | Groß Britannien (2) |
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| Draper, Jack | | Edmund, Kyle |
| | Vereinigte Staaten (5) |
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| Cressy, Maxime | | Johnson, Steve | | Kudla, Denis | | Nava, Emilio | | Wolf, J.J. |
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