Challengers by country
France
31
Germany
27
Poland
20
Sweden
18
Turkey
18
Denmark
15
Spain
12
South Korea
11
Netherlands
8
Austria
6
Norway
6
Russia
5
Czech Republic
5
Greece
5
Portugal
4
Romania
4
Slovakia
4
Croatia
4
United Kingdom
4
China
4
Belgium
3
Serbia
2
Hungary
2
Estonia
2
Australia
2
Bulgaria
2
Bosnia and Herzegovina
2
Finland
2
Switzerland
1
Lithuania
1
Belarus
1
Montenegro
1
Albania
1
Tunisia
1
Ukraine
1
Slovenia
1
Italy
1
Saudi Arabia
1
Lebanon
1