FAMILY. Who are Tsitsipas' brothers, sister, father, mother … “My dad had a big influence too. Seine Mutter Julia Apostoli (geb. Für Djokovic geht es im … French Open - Rückzug von Holger Rune via Instagram schlägt … Stefanos Tsitsipas retires with injury at Stefan Mross: Medienbericht: Seine Tante und Cousine Both Stefanos Tsitsipas and Maria Sakkari stand in the Top 10 Rankings of the ATP and WTA Tour, respectively. Stefanos Tsitsipas Stefanos Tsitsipas It is Tsitsipas’ father, Apostolos, who has been his son’s main coach throughout the years, but it is the Greek’s mother who has arguably provided the most inspiration.