| Argentina (4) |
|---|
| Delbonis, Federico | | Mayer, Leonardo | | Pella, Guido | | Schwartzman, Diego |
| | Australia (9) |
|---|
| Duckworth, James | | Ebden, Matthew | | Groth, Sam | | Hewitt, Lleyton | | Kokkinakis, Thanasi | | Kyrgios, Nick | | Millman, John | | Smith, John-Patrick | | Tomic, Bernard |
| | Austria (3) |
|---|
| Haider-Maurer, Andreas | | Melzer, Jurgen | | Thiem, Dominic |
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|---|
| Bemelmans, Ruben | | Darcis, Steve | | Goffin, David |
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| Dzumhur, Damir |
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|---|
| Bellucci, Thomaz | | Souza, Joao |
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| Dimitrov, Grigor |
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|---|
| Pospisil, Vasek | | Raonic, Milos |
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| Colombia (2) |
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| Giraldo, Santiago | | Gonzalez, Alejandro |
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|---|
| Cilic, Marin | | Coric, Borna | | Karlovic, Ivo |
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| Baghdatis, Marcos |
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|---|
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|---|
| Estrella Burgos, Victor |
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|---|
| Nieminen, Jarkko |
| | France (11) |
|---|
| Chardy, Jeremy | | Gasquet, Richard | | Herbert, Pierre-Hugues | | Mahut, Nicolas | | Mannarino, Adrian | | Mathieu, Paul-Henri | | Monfils, Gael | | Paire, Benoit | | Pouille, Lucas | | Simon, Gilles | | Tsonga, Jo-Wilfried |
| | Georgia (1) |
|---|
| Basilashvili, Nikoloz |
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| Germany (7) |
|---|
| Becker, Benjamin | | Berrer, Michael | | Brown, Dustin | | Haas, Tommy | | Kohlschreiber, Philipp | | Mayer, Florian | | Zverev, Alexander |
| | | Italy (5) |
|---|
| Bolelli, Simone | | Cecchinato, Marco | | Fognini, Fabio | | Lorenzi, Paolo | | Seppi, Andreas |
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| |
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|---|
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| Bedene, Aljaz |
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| Anderson, Kevin |
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|---|
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| |
| Switzerland (2) |
|---|
| Federer, Roger | | Wawrinka, Stan |
| | | |
| Ukraine (4) |
|---|
| Dolgopolov, Alexandr | | Marchenko, Illya | | Nedovyesov, Aleksandr | | Stakhovsky, Sergiy |
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| Murray, Andy | | Ward, James |
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|---|
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| |
| Uzbekistan (1) |
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| Istomin, Denis |
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