Challengers by country
Germany
36
France
34
Poland
29
Türkiye
23
Sweden
14
Greece
9
Denmark
8
Spain
8
Netherlands
6
Czech Republic
5
Belgium
5
Austria
4
United Kingdom
4
Bulgaria
4
Italy
4
Portugal
4
Serbia
3
Switzerland
3
Croatia
3
Russia
3
Lithuania
3
Morocco
2
Egypt
2
Norway
2
Romania
2
Finland
2
Hungary
2
Ukraine
2
Slovenia
2
Antarctica
1
Algeria
1
Jordan
1
Montenegro
1
Georgia
1
Lebanon
1
Estonia
1
South Korea
1
United States
1
Albania
1
China
1