Challengers by country
Germany
37
France
34
Poland
20
Türkiye
18
Sweden
18
Netherlands
10
Denmark
10
Bulgaria
9
United Kingdom
9
Spain
8
Czech Republic
7
Austria
6
Serbia
6
Russia
5
Norway
4
South Korea
4
Brazil
3
China
3
Greece
3
Italy
3
Slovenia
2
Croatia
2
Switzerland
2
Romania
2
Portugal
2
Lithuania
2
Moldova
2
Lebanon
1
Bosnia and Herzegovina
1
Kuwait
1
Saudi Arabia
1
Armenia
1
Estonia
1
Jordan
1
Slovakia
1
Israel
1
Tunisia
1
Hungary
1
Albania
1
Belgium
1
Ukraine
1