| Argentina (3) |
|---|
| Baez, Sebastian | | Coria, Federico | | Schwartzman, Diego |
| | Australia (1) |
|---|
| Thompson, Jordan |
| | Austria (1) |
|---|
| Thiem, Dominic |
| |
| Canada (1) |
|---|
| Auger-Aliassime, Felix |
| | | Repubblica Ceca (1) |
|---|
| Vesely, Jiri |
| | Francia (4) |
|---|
| Bonzi, Benjamin | | Gasquet, Richard | | Herbert, Pierre-Hugues | | Paire, Benoit |
|
| Portogallo (2) |
|---|
| Borges, Nuno | | Sousa, Joao |
| | | Sud Africa (1) |
|---|
| Harris, Lloyd |
| | Corea del Sud (1) |
|---|
| Kwon, Soonwoo |
|
| Spagna (7) |
|---|
| Andujar, Pablo | | Carballes Baena, Roberto | | Davidovich Fokina, Alejandro | | Ramos-Vinolas, Albert | | Taberner, Carlos | | Verdasco, Fernando | | Zapata Miralles, Bernabe |
| | Stati Uniti (3) |
|---|
| Korda, Sebastian | | Paul, Tommy | | Tiafoe, Frances |
| |