| Argentina (2) |
|---|
| Mayer, Leonardo | | Schwartzman, Diego |
| | Australien (2) |
|---|
| De Minaur, Alex | | Millman, John |
| | Canada (1) |
|---|
| Shapovalov, Denis |
| |
| Ecuador (1) |
|---|
| Quiroz, Roberto |
| | Frankrig (1) |
|---|
| Simon, Gilles |
| | Tyskland (2) |
|---|
| Brands, Daniel | | Zverev, Mischa |
| | Italien (3) |
|---|
| Berrettini, Matteo | | Cecchinato, Marco | | Seppi, Andreas |
|
| Kasakhstan (1) |
|---|
| Kukushkin, Mikhail |
| | Luxembourg (1) |
|---|
| Muller, Gilles |
| | Rusland (1) |
|---|
| Medvedev, Daniil |
| | Slovakiet (1) |
|---|
| Lacko, Lukas |
|
| | Schweizisk (1) |
|---|
| Wawrinka, Stan |
| | Storbritannien (4) |
|---|
| Clarke, Jay | | Edmund, Kyle | | Murray, Andy | | Norrie, Cameron |
| | USA (4) |
|---|
| Donaldson, Jared | | Fritz, Taylor | | Harrison, Ryan | | Johnson, Steve |
|
| Usbekistan (1) |
|---|
| Istomin, Denis |
|