Marin Čilić
Croatia can be proud of the tennis champion who brought his country honor on more than one occasion. Marin Čilić has won 17 ATP singles titles and achieved the rank of number 4 in the world in October 2017. One year earlier at the 2016 Davis Cup he served at 235 km/h (146 mph) making him the 23rd fastest server in the world.
Ivana Jorović
Born in Serbia in 1997, Ivana Jorović is still a young and upcoming tennis player. But don’t be fooled by her age, she is already an all-star athlete. She successfully served at 207 km/h (129 mph) during the 2017 Fed Cup – which is still running into next month – which ranked her as the 3rd fastest female server.