| Argentina (2) |
|---|
| Pella, Guido | | Schwartzman, Diego |
| | Østrig (2) |
|---|
| Novak, Dennis | | Thiem, Dominic |
| | Bosnien og Herzegovina (1) |
|---|
| Dzumhur, Damir |
| | Bulgarien (1) |
|---|
| Dimitrov, Grigor |
|
| Canada (3) |
|---|
| Auger-Aliassime, Felix | | Raonic, Milos | | Shapovalov, Denis |
| | | Frankrig (5) |
|---|
| Herbert, Pierre-Hugues | | Mannarino, Adrian | | Monfils, Gael | | Simon, Gilles | | Tsonga, Jo-Wilfried |
| | Georgien (1) |
|---|
| Basilashvili, Nikoloz |
|
| Tyskland (1) |
|---|
| Kohlschreiber, Philipp |
| | Ungarn (1) |
|---|
| Fucsovics, Marton |
| | Italien (3) |
|---|
| Berrettini, Matteo | | Sinner, Jannik | | Sonego, Lorenzo |
| | Kasakhstan (2) |
|---|
| Bublik, Alexander | | Kukushkin, Mikhail |
|
| | Rusland (2) |
|---|
| Khachanov, Karen | | Rublev, Andrey |
| | Slovenien (1) |
|---|
| Bedene, Aljaz |
| |
| Spanien (3) |
|---|
| Carreno Busta, Pablo | | Lopez, Feliciano | | Verdasco, Fernando |
| | Storbritannien (1) |
|---|
| Edmund, Kyle |
| |