Challengers by country
France
39
Germany
28
Turkey
22
Sweden
22
Poland
16
United Kingdom
13
Spain
13
Netherlands
10
China
9
South Korea
9
Denmark
6
Austria
6
Bulgaria
5
Czech Republic
4
Belgium
4
Greece
4
United States of America
4
Norway
4
Serbia
4
Estonia
4
Russia
4
Hungary
3
Slovakia
3
Portugal
3
Croatia
2
Latvia
2
Lithuania
2
Canada
1
Lebanon
1
Slovenia
1
Japan
1
Switzerland
1
Italy
1
Taiwan
1
Finland
1
Israel
1