| Argentina (2) |
|---|
| Del Potro, Juan Martin | | Mayer, Leonardo |
| | Australien (1) |
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| Kyrgios, Nick |
| | | Bosnien og Herzegovina (1) |
|---|
| Dzumhur, Damir |
|
| Bulgarien (1) |
|---|
| Dimitrov, Grigor |
| | | Tjekkiet (1) |
|---|
| Berdych, Tomas |
| | Frankrig (1) |
|---|
| Pouille, Lucas |
|
| Georgien (1) |
|---|
| Basilashvili, Nikoloz |
| | Tyskland (3) |
|---|
| Struff, Jan-Lennard | | Zverev, Alexander | | Zverev, Mischa |
| | Italien (2) |
|---|
| Fognini, Fabio | | Lorenzi, Paolo |
| |
| Rusland (2) |
|---|
| Khachanov, Karen | | Rublev, Andrey |
| | Serbien (1) |
|---|
| Lajovic, Dusan |
| | Slovenien (1) |
|---|
| Bedene, Aljaz |
| | Spanien (5) |
|---|
| Bautista Agut, Roberto | | Carreno Busta, Pablo | | Granollers, Marcel | | Nadal, Rafael | | Verdasco, Fernando |
|
| Tunesien (1) |
|---|
| Jaziri, Malek |
| | Storbritannien (1) |
|---|
| Edmund, Kyle |
| | USA (3) |
|---|
| Donaldson, Jared | | Isner, John | | Sock, Jack |
| |