| Argentina (3) |
|---|
| Londero, Juan Ignacio | | Pella, Guido | | Schwartzman, Diego |
| | Australien (2) |
|---|
| De Minaur, Alex | | Millman, John |
| | |
| Canada (3) |
|---|
| Auger-Aliassime, Felix | | Pospisil, Vasek | | Shapovalov, Denis |
| | Chile (1) |
|---|
| Garin, Christian |
| | Kina (3) |
|---|
| Li, Zhe | | Zhang, Ze | | Zhang, Zhizhen |
| | Kroatien (2) |
|---|
| Cilic, Marin | | Coric, Borna |
|
| Frankrig (6) |
|---|
| Chardy, Jeremy | | Gasquet, Richard | | Monfils, Gael | | Paire, Benoit | | Pouille, Lucas | | Simon, Gilles |
| | Georgien (1) |
|---|
| Basilashvili, Nikoloz |
| | Tyskland (2) |
|---|
| Struff, Jan-Lennard | | Zverev, Alexander |
| | Grækenland (1) |
|---|
| Tsitsipas, Stefano |
|
| Italien (4) |
|---|
| Berrettini, Matteo | | Cecchinato, Marco | | Fognini, Fabio | | Sonego, Lorenzo |
| | Kasakhstan (2) |
|---|
| Bublik, Alexander | | Kukushkin, Mikhail |
| | |
| | Rusland (3) |
|---|
| Khachanov, Karen | | Medvedev, Daniil | | Rublev, Andrey |
| | Serbien (4) |
|---|
| Djokovic, Novak | | Kecmanovic, Miomir | | Krajinovic, Filip | | Lajovic, Dusan |
| | Spanien (4) |
|---|
| Bautista Agut, Roberto | | Carreno Busta, Pablo | | Ramos-Vinolas, Albert | | Verdasco, Fernando |
|
| Schweizisk (1) |
|---|
| Federer, Roger |
| | Storbritannien (3) |
|---|
| Edmund, Kyle | | Murray, Andy | | Norrie, Cameron |
| | USA (5) |
|---|
| Fritz, Taylor | | Isner, John | | Opelka, Reilly | | Querrey, Sam | | Tiafoe, Frances |
| |