| Country | Number One | % Correct |
|---|---|---|
| UK | Andy Murray | 100%
|
| Serbia | Novak Djokovic | 100%
|
| Belgium | David Goffin | 96%
|
| Austria | Dominic Thiem | 96%
|
| Bulgaria | Grigor Dimitrov | 96%
|
| Japan | Kei Nishikori | 96%
|
| Croatia | Marin Cilic | 96%
|
| Canada | Milos Raonic | 96%
|
| Australia | Nick Kyrgios | 96%
|
| Czech Republic | Tomas Berdych | 96%
|
| Germany | Alexander Zverev | 92%
|
| Italy | Fabio Fognini | 92%
|
| South Africa | Kevin Anderson | 92%
|
| Spain | Rafael Nadal | 92%
|
| Switzerland | Stanislas Wawrinka | 92%
|
| Luxembourg | Gilles Muller | 88%
|
| USA | Jack Sock | 88%
|
| France | Jo-Wilfried Tsonga | 88%
|
| Argentina | Juan Martin del Potro | 88%
|
| Uruguay | Pablo Cuevas | 88%
|
| Cyprus | Marcos Baghdatis | 77%
|
| Ukraine | Alexandr Dolgopolov | 65%
|
| Portugal | Joao Sousa | 62%
|
| Netherlands | Robin Haase | 58%
|
| Russia | Karen Khachanov | 54%
|
| Uzbekistan | Denis Istomin | 50%
|
| Israel | Dudi Sela | 42%
|
| Brazil | Thomaz Bellucci | 42%
|