| Argentina (3) |
|---|
| Del Potro, Juan Martin | | Mayer, Leonardo | | Schwartzman, Diego |
| | Australia (1) |
|---|
| Kyrgios, Nick |
| | Austria (1) |
|---|
| Thiem, Dominic |
| |
| Bosnia-Herzegovina (1) |
|---|
| Dzumhur, Damir |
| | Bulgaria (1) |
|---|
| Dimitrov, Grigor |
| | Canada (2) |
|---|
| Raonic, Milos | | Shapovalov, Denis |
| | Croatia (2) |
|---|
| Cilic, Marin | | Coric, Borna |
|
| France (5) |
|---|
| Chardy, Jeremy | | Gasquet, Richard | | Mannarino, Adrian | | Paire, Benoit | | Pouille, Lucas |
| | Germany (5) |
|---|
| Gojowczyk, Peter | | Kohlschreiber, Philipp | | Marterer, Maximilian | | Zverev, Alexander | | Zverev, Mischa |
| | Greece (1) |
|---|
| Tsitsipas, Stefano |
| | Hungary (1) |
|---|
| Fucsovics, Marton |
|
| Italy (1) |
|---|
| Cecchinato, Marco |
| | | Netherlands (1) |
|---|
| Haase, Robin |
| | Poland (1) |
|---|
| Hurkacz, Hubert |
|
| | | Russia (3) |
|---|
| Khachanov, Karen | | Medvedev, Daniil | | Rublev, Andrey |
| | Serbia (3) |
|---|
| Djokovic, Novak | | Krajinovic, Filip | | Lajovic, Dusan |
|
| South Africa (1) |
|---|
| Anderson, Kevin |
| | South Korea (1) |
|---|
| Chung, Hyeon |
| | Spain (5) |
|---|
| Carreno Busta, Pablo | | Ferrer, David | | Garcia-Lopez, Guillermo | | Ramos-Vinolas, Albert | | Verdasco, Fernando |
| | Switzerland (2) |
|---|
| Federer, Roger | | Wawrinka, Stan |
|
| | United Kingdom (2) |
|---|
| Edmund, Kyle | | Murray, Andy |
| | United States (9) |
|---|
| Isner, John | | Johnson, Steve | | Klahn, Bradley | | Kudla, Denis | | McDonald, Mackenzie | | Mmoh, Michael | | Querrey, Sam | | Sock, Jack | | Tiafoe, Frances |
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