| Argentina (3) |
|---|
| Berlocq, Carlos | | Del Potro, Juan Martin | | Schwartzman, Diego |
| | Australien (4) |
|---|
| Gavrilova, Daria | | Kyrgios, Nick | | Stosur, Samantha | | Tomic, Bernard |
| | |
| Brasilien (2) |
|---|
| Bellucci, Thomaz | | Monteiro, Thiago |
| | Bulgarien (1) |
|---|
| Dimitrov, Grigor |
| | | Kina (3) |
|---|
| Peng, Shuai | | Wang, Qiang | | Zhang, Shuai |
|
| Kroatien (4) |
|---|
| Cilic, Marin | | Karlovic, Ivo | | Lucic-Baroni, Mirjana | | Vekic, Donna |
| | Tjekkiet (6) |
|---|
| Berdych, Tomas | | Pliskova, Karolina | | Safarova, Lucie | | Siniakova, Katerina | | Strycova, Barbora | | Vesely, Jiri |
| | Estland (1) |
|---|
| Kontaveit, Anett |
| | Frankrig (8) |
|---|
| Cornet, Alizé | | Garcia, Caroline | | Mahut, Nicolas | | Mannarino, Adrian | | Mladenovic, Kristina | | Paire, Benoit | | Pouille, Lucas | | Simon, Gilles |
|
| Tyskland (10) |
|---|
| Barthel, Mona | | Goerges, Julia | | Haas, Tommy | | Kerber, Angelique | | Mayer, Florian | | Petkovic, Andrea | | Siegemund, Laura | | Struff, Jan-Lennard | | Zverev, Alexander | | Zverev, Mischa |
| | | Italien (8) |
|---|
| Berrettini, Matteo | | Chiesa, Deborah | | Errani, Sara | | Fognini, Fabio | | Mager, Gianluca | | Napolitano, Stefano | | Seppi, Andreas | | Vinci, Roberta |
| | Japan (3) |
|---|
| Doi, Misaki | | Nishikori, Kei | | Osaka, Naomi |
|
| Kasakhstan (2) |
|---|
| Putintseva, Yulia | | Shvedova, Yaroslava |
| | Letland (2) |
|---|
| Ostapenko, Jelena | | Sevastova, Anastasija |
| | Mexico (1) |
|---|
| Escobedo, Ernesto |
| | Holland (2) |
|---|
| Bertens, Kiki | | Haase, Robin |
|
| | Puerto Rico (1) |
|---|
| Puig, Monica |
| | Rumænien (3) |
|---|
| Begu, Irina-Camelia | | Halep, Simona | | Niculescu, Monica |
| | Rusland (6) |
|---|
| Kasatkina, Daria | | Kuznetsova, Svetlana | | Makarova, Ekaterina | | Pavlyuchenkova, Anastasia | | Sharapova, Maria | | Vesnina, Elena |
|
| Serbien (3) |
|---|
| Djokovic, Novak | | Jankovic, Jelena | | Troicki, Viktor |
| | Slovakiet (1) |
|---|
| Cibulkova, Dominika |
| | Slovenien (1) |
|---|
| Bedene, Aljaz |
| | Sydafrika (1) |
|---|
| Anderson, Kevin |
|
| Spanien (10) |
|---|
| Almagro, Nicolas | | Bautista Agut, Roberto | | Carreno Busta, Pablo | | Ferrer, David | | Lopez, Feliciano | | Muguruza, Garbiñe | | Nadal, Rafael | | Ramos-Vinolas, Albert | | Suárez Navarro, Carla | | Verdasco, Fernando |
| | Schweizisk (2) |
|---|
| Bacsinszky, Timea | | Wawrinka, Stan |
| | Ukraine (3) |
|---|
| Dolgopolov, Alexandr | | Svitolina, Elina | | Tsurenko, Lesia |
| | Storbritannien (4) |
|---|
| Edmund, Kyle | | Evans, Daniel | | Konta, Johanna | | Murray, Andy |
|
| USA (13) |
|---|
| Bellis, CiCi | | Davis, Lauren | | Donaldson, Jared | | Harrison, Ryan | | Isner, John | | Keys, Madison | | McHale, Christina | | Querrey, Sam | | Riske, Alison | | Rogers, Shelby | | Sock, Jack | | Williams, Venus | | Young, Donald |
| |