28-year-old Czech tennis player Katerina Siniakova is one of the best doubles players. She achieved her career-high doubles ranking of No. 1 in October 2018. The last season has been quite ...

The ratings are based on a scale of 1 to 7, with 7 representing the highest level of democratic progress and 1 the lowest. The Democracy Score is an average of ratings for the categories tracked in a ...