| Argentina (3) |
|---|
| Baez, Sebastian | | Cerundolo, Francisco | | Schwartzman, Diego |
| | Australien (3) |
|---|
| De Minaur, Alex | | Kokkinakis, Thanasi | | Kyrgios, Nick |
| | | Bulgarien (1) |
|---|
| Dimitrov, Grigor |
|
| Canada (2) |
|---|
| Auger-Aliassime, Felix | | Shapovalov, Denis |
| | Kroatien (2) |
|---|
| Cilic, Marin | | Coric, Borna |
| | | Finland (1) |
|---|
| Ruusuvuori, Emil |
|
| Frankrig (1) |
|---|
| Bonzi, Benjamin |
| | Georgien (1) |
|---|
| Basilashvili, Nikoloz |
| | Grækenland (1) |
|---|
| Tsitsipas, Stefanos |
| | Italien (5) |
|---|
| Berrettini, Matteo | | Fognini, Fabio | | Musetti, Lorenzo | | Sinner, Jannik | | Sonego, Lorenzo |
|
| Holland (1) |
|---|
| Zandschulp, Botic van de |
| | | | Rusland (4) |
|---|
| Karatsev, Aslan | | Khachanov, Karen | | Medvedev, Daniil | | Rublev, Andrey |
|
| Serbien (2) |
|---|
| Kecmanovic, Miomir | | Krajinovic, Filip |
| | Slovakiet (1) |
|---|
| Molcan, Alex |
| | Spanien (7) |
|---|
| Alcaraz, Carlos | | Bautista Agut, Roberto | | Carreno Busta, Pablo | | Davidovich Fokina, Alejandro | | Munar, Jaume | | Nadal, Rafael | | Ramos-Vinolas, Albert |
| | Schweizisk (2) |
|---|
| Laaksonen, Henri | | Wawrinka, Stan |
|
| Storbritannien (3) |
|---|
| Evans, Daniel | | Murray, Andy | | Norrie, Cameron |
| | USA (12) |
|---|
| Brooksby, Jenson | | Cressy, Maxime | | Fritz, Taylor | | Giron, Marcos | | Isner, John | | Korda, Sebastian | | McDonald, Mackenzie | | Nakashima, Brandon | | Paul, Tommy | | Shelton, Ben | | Tiafoe, Frances | | Wolf, J.J. |
|