Zverev has previously been the subject of serious allegations.
In October 2020, his ex-partner Olga Sharypova accused him of physical violence and controlling behaviour.
Zverev maintained his innocence from the start and described the allegations as baseless.
There were no legal proceedings, but the ATP Tour opened a major investigation that was carried out by third-party investigators.
It found “insufficient evidence to substantiate published allegations of abuse”.
“Based on a lack of reliable evidence and eyewitness reports, in addition to conflicting statements by Sharypova, Zverev and other interviewees, the investigation was unable to substantiate the allegations of abuse,” the ATP said in January 2023.
A director of safeguarding was subsequently appointed, and this year a new safeguarding programme was launched to introduce a “clear, global framework for preventing and responding to abuse, including cases of harassment, bullying, domestic violence and other forms of misconduct”.
In October 2023, Zverev was issued with a penalty order and fined 450,000 euros (£392,000) by a German court for bodily harm against another ex-girlfriend, Brenda Patea.
Zverev denied the claims and contested the order, with a public trial taking place in Berlin in May 2024.
A week into the process, the court terminated the proceedings before a verdict could be reached, and told the BBC there had been a settlement between Zverev and Patea.
“The decision is not a verdict and it is not a decision about guilt or innocence,” the court said.
“One decisive factor for the court decision was that the witness [Zverev’s ex-partner] has expressed her wish to end the trial.”