| Argentina (5) |
|---|
| Baez, Sebastian | | Cerundolo, Francisco | | Etcheverry, Tomas Martin | | Navone, Mariano | | Ugo Carabelli, Camilo |
| | Australia (3) |
|---|
| De Minaur, Alex | | Popyrin, Alexei | | Thompson, Jordan |
| | Bulgaria (1) |
|---|
| Dimitrov, Grigor |
| | Canada (2) |
|---|
| Auger-Aliassime, Felix | | Shapovalov, Denis |
|
| Cile (2) |
|---|
| Jarry, Nicolas | | Tabilo, Alejandro |
| | | Repubblica Ceca (2) |
|---|
| Lehecka, Jiri | | Machac, Tomas |
| | Danimarca (1) |
|---|
| Rune, Holger |
|
| Francia (7) |
|---|
| Fils, Arthur | | Gasquet, Richard | | Humbert, Ugo | | Monfils, Gael | | Moutet, Corentin | | Mpetshi Perricard, Giovanni | | Muller, Alexandre |
| | Germania (3) |
|---|
| Altmaier, Daniel | | Struff, Jan-Lennard | | Zverev, Alexander |
| | Grecia (1) |
|---|
| Tsitsipas, Stefanos |
| | Ungheria (1) |
|---|
| Marozsan, Fabian |
|
| Italia (6) |
|---|
| Arnaldi, Matteo | | Berrettini, Matteo | | Cobolli, Flavio | | Fognini, Fabio | | Musetti, Lorenzo | | Sonego, Lorenzo |
| | Monaco (1) |
|---|
| Vacherot, Valentin |
| | Olanda (1) |
|---|
| Griekspoor, Tallon |
| |
| Portogallo (1) |
|---|
| Borges, Nuno |
| | Russia (3) |
|---|
| Khachanov, Karen | | Medvedev, Daniil | | Rublev, Andrey |
| | Serbia (3) |
|---|
| Djokovic, Novak | | Kecmanovic, Miomir | | Lajovic, Dusan |
| | Spagna (4) |
|---|
| Alcaraz, Carlos | | Bautista Agut, Roberto | | Davidovich Fokina, Alejandro | | Martinez, Pedro |
|
| Svizzera (1) |
|---|
| Wawrinka, Stan |
| | Regno Unito (1) |
|---|
| Draper, Jack |
| | Stati Uniti (5) |
|---|
| Giron, Marcos | | Korda, Sebastian | | Nakashima, Brandon | | Shelton, Ben | | Tiafoe, Frances |
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