Why Arantxa Sánchez Vicario and Martina Hingis are similar

Capital of Liechtenstein and also the seat of the national parliament. Located along the Rhine River, has 5,696 residents. Wikipedia

German-speaking microstate situated in the Alps and in the southwest of Central Europe. Semi-constitutional monarchy headed by the Prince of Liechtenstein; the Prince's extensive powers are equivalent to those of a President in a semi-presidential system. Wikipedia

West Germanic language mainly spoken in Central Europe. Most widely spoken and official or co-official language in Germany, Austria, Switzerland, Liechtenstein, Italian South Tyrol and parts of southwestern Poland. Wikipedia

Romance language of the Indo-European family. It descended from the Vulgar Latin of the Roman Empire, as did all Romance languages. Wikipedia

Country located at the crossroads of Central, Eastern, and Southeastern Europe. It shares land borders with Bulgaria to the south, Ukraine to the north, Hungary to the west, Serbia to the southwest, and Moldova to the east and has its opening to the Black Sea. Wikipedia

Global war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all the great powers—forming two opposing military alliances: the Allies and the Axis. Wikipedia