Which top tennis player became father to two sets of twins in less than five years?
Tennis in Argentina Guillermo Vilas did in 1977. Del Potro defeated world number 2 Rafael Nadal in straight sets in semifinals to reach the final and eventually beat world number 1 Roger Federer in five sets. That year Del Potro reached the final of the ATP World Tour Championship. In 2016, the Argentine Copa Davis team were crowned world champions. Juan Martín del Potro, Federico Delbonis, Leonardo Mayer and Guido Pella earned the country their first title in the sport's most important inter-country competition. Tennis in Argentina Tennis in Argentina is regulated by the "Asociación Argentina de Tenis" (Argentine Tennis Association), which also
Aleksandar Popović (1920s tennis player) Grahn and Bo Grotenfeld to oppose them. Less than a month later, at the championship of Yugoslavia in Zagreb, Popović retained his title in the international field. In the semifinals he had a tough duel with Podvineć, which he won in three sets. In the final he won with Dr. Müller as his partner. After World War II he emigrated to Switzerland, where he no longer played tennis and changed his surname. Aleksandar Popović (1920s tennis player) Aleksandar Popović (, was a Yugoslav tennis player of Serbian ethnicity. Aleksandar Popović was born in Belgrade. In 1926 he was invited to