In the 1970s she became a junior tennis coach and was later credited for playing a major role in the early development of numerous future top class professional players and Grand Slam champions.

Among the players she discovered and coached are Monica Seles, Novak Djokovic, Goran Ivanišević, Mima Jaušovec, Iva Majoli, and Tatjana Ječmenica.

Born as one of seven children to Serbian father Jovan and Austrian mother Hermina, Jelena came from the prominent Genčić family in Serbia.

[4] Playing both sports simultaneously was sometimes a tough challenge; on one occasion in 1950, she was the goalkeeper in a friendly handball match with Austria in Graz, and the very next day the French Open started, so she took the train from Vienna to Paris by herself despite still being aged 13 at the time.

Her work on television rarely overlapped with sports as she was mostly involved with producing arts-and-culture programmes dealing with the history of art in Serbia, classical music, and theater.

[2][3] Over the following 30 years she played a part in discovering and coaching Novak Djokovic, Monica Seles,[1][4] Goran Ivanišević, Mima Jaušovec, Iva Majoli, and Tatjana Ječmenica.

[2] In late 1992, the president of Genex, a state-owned company that operated tourism in Yugoslavia, asked Genčić to be the director of a summer tennis camp that he wanted to run at its newly-built complex in Kopaonik, a popular tourist destination in the mountains.

[2] After accepting the offer, Genčić herself organized the tennis camp made up of a group of young players from the TK Partizan, which lasted 9 weeks.

[14][15] During the Yugoslav Wars in the late 1990s, Genčić and Djokovic had to endure embargos, which unabled him to travel for several junior tournaments,[15] and NATO bombings, which constantly halted their training sessions.

[16][17] After retiring from TV at the end of the 1990s, she opened a tennis school in Banjica,[1] where she organized several tournaments, one for each age bracket, from the youngest of the children to teenagers, and always awarded cups to the winners.

[19] Two days after breaking down in the locker room on being told of her death, he beat Philipp Kohlschreiber in four sets and wrote “Jeco Love You Forever” on the camera lens as he left the court.

[20] Furthermore, the final match of the World Handball Championship in Belgrade in 1957, in which Genčić helped the Yugoslav team win bronze, had been held in the Tašmajdan Stadium.