| Argentina (2) |
|---|
| Del Potro, Juan Martin | | Mayer, Leonardo |
| | Bulgarien (1) |
|---|
| Dimitrov, Grigor |
| | Canada (1) |
|---|
| Pospisil, Vasek |
| |
| | Cypern (1) |
|---|
| Baghdatis, Marcos |
| | Frankrig (1) |
|---|
| Monfils, Gael |
| | Georgien (1) |
|---|
| Basilashvili, Nikoloz |
|
| Tyskland (3) |
|---|
| Gojowczyk, Peter | | Zverev, Alexander | | Zverev, Mischa |
| | Ungarn (1) |
|---|
| Fucsovics, Marton |
| | Italien (4) |
|---|
| Berrettini, Matteo | | Cecchinato, Marco | | Fognini, Fabio | | Seppi, Andreas |
| |
| | Rusland (2) |
|---|
| Khachanov, Karen | | Rublev, Andrey |
| | Serbien (2) |
|---|
| Krajinovic, Filip | | Lajovic, Dusan |
| | Spanien (4) |
|---|
| Bautista Agut, Roberto | | Lopez, Feliciano | | Ramos-Vinolas, Albert | | Verdasco, Fernando |
|
| Tunesien (1) |
|---|
| Jaziri, Malek |
| | Storbritannien (1) |
|---|
| Edmund, Kyle |
| | USA (4) |
|---|
| Harrison, Ryan | | Querrey, Sam | | Sandgren, Tennys | | Sock, Jack |
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