| Argentinië (5) |
|---|
| Bagnis, Facundo | | Delbonis, Federico | | Monaco, Juan | | Pella, Guido | | Schwartzman, Diego |
| | Oostenrijk (1) |
|---|
| Thiem, Dominic |
| | Brazilië (3) |
|---|
| Bellucci, Thomaz | | Monteiro, Thiago | | Souza, Joao |
| |
| Colombia (1) |
|---|
| Giraldo, Santiago |
| | Frankrijk (1) |
|---|
| Tsonga, Jo-Wilfried |
| | Italië (3) |
|---|
| Cecchinato, Marco | | Fognini, Fabio | | Lorenzi, Paolo |
| |
| Portugal (1) |
|---|
| Elias, Gastao |
| | | Slovenië (1) |
|---|
| Bedene, Aljaz |
| | Spanje (9) |
|---|
| Almagro, Nicolas | | Andujar, Pablo | | Carreno Busta, Pablo | | Cervantes, Inigo | | Ferrer, David | | Gimeno-Traver, Daniel | | Muñoz de la Nava, Daniel | | Nadal, Rafael | | Ramos-Vinolas, Albert |
|
| Oekraïne (1) |
|---|
| Dolgopolov, Alexandr |
| | Verenigde Staten (2) |
|---|
| Isner, John | | Sock, Jack |
| |