The Guardian reported that the Tiergarten District Court in Berlin fined Zverev 450,000 euros ($476,000).
In January, the Association of Tennis Professionals (ATP) closed an investigation that was launched after another ex-girlfriend, tennis player Olga Sharypova, accused Zverev of domestic abuse.
The ATP cited insufficient evidence as its reason for dropping the case.
Zverev, 26, is currently playing at the Paris Masters, where he beat Marton Fucsovics 4-6 7-5 6-4 on Tuesday.
Reporting by Chiranjit Ojha in Bengaluru; Editing by Simon Cameron-MooreOur Standards: The Thomson Reuters Trust Principles.
Persons:
Germany's Alexander Zverev, Hungary's Marton Fucsovics, Stephanie Lecocq, Alexander Zverev, Brenda Patea, Olga Sharypova, Marton Fucsovics, Ugo Humbert, Chiranjit, Simon Cameron, Moore
Organizations:
Paris, Hungary's Marton Fucsovics REUTERS, Guardian, Association of Tennis Professionals, Paris Masters, Thomson
Locations:
Paris, France, Berlin, Tiergarten, Bengaluru