| Argentina (2) |
|---|
| Del Potro, Juan Martin | | Schwartzman, Diego |
| | Australia (2) |
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| Ebden, Matthew | | Kokkinakis, Thanasi |
| | Austria (1) |
|---|
| Thiem, Dominic |
| | Canada (1) |
|---|
| Shapovalov, Denis |
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| France (1) |
|---|
| Mannarino, Adrian |
| | Georgia (1) |
|---|
| Basilashvili, Nikoloz |
| | Germany (3) |
|---|
| Gojowczyk, Peter | | Zverev, Alexander | | Zverev, Mischa |
| | Japan (2) |
|---|
| Daniel, Taro | | Nishikori, Kei |
|
| Kazakhstan (1) |
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| Bublik, Alexander |
| | Lithuania (1) |
|---|
| Berankis, Ricardas |
| | Mexico (2) |
|---|
| Escobedo, Ernesto | | Gomez, Lucas |
| |
| | South Africa (1) |
|---|
| Anderson, Kevin |
| | South Korea (1) |
|---|
| Chung, Hyeon |
| | Spain (4) |
|---|
| Ferrer, David | | Lopez, Feliciano | | Nadal, Rafael | | Verdasco, Fernando |
|
| United Kingdom (1) |
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| Norrie, Cameron |
| | United States (8) |
|---|
| Donaldson, Jared | | Harrison, Ryan | | Isner, John | | Johnson, Steve | | McDonald, Mackenzie | | Querrey, Sam | | Sock, Jack | | Young, Donald |
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