It's election day and you are representing the Lime Green Party of America. Name any state to grab its electoral votes and defeat the hated Periwinkle party.
for Navratilova and Lendl, either Czechoslovakia and / or USA, but Czech Republic doesn't make any sense, as the country did not exist yet when they became American citizens.
Same for Monica Seles. I would accept Yugoslavia and USA, but she never played (or lived) with Serbian nationality.
Martina Hingis has always played as a Swiss citizen
Yes, that is why I quite clearly state MODERN countries. You see, It's like when Italy is accepted as the nationality/birth place of Leonardo da Vinci even though it was hundreds of years before Italy even came to existence.
Same for Monica Seles. I would accept Yugoslavia and USA, but she never played (or lived) with Serbian nationality.
Martina Hingis has always played as a Swiss citizen