The ATP announced that it has opened investigations into domestic violence charges against Alexander Zverev by former girlfriend Olga Sharypova.
Last October, Sharypova accused the world No 4 of a series of serious assaults.
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In an interview published in August, Sharypova claimed that Zverev had punched her in their hotel room during the Shanghai Masters in October 2019.
In desperation and for a second time, she injected herself with insulin.
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Though Zverev had issued a blanket denial earlier, he has taken legal action against Sharypova and the journalist after she spoke about the Shanghai incident.
The ATP had come under a lot of criticism, including that from high profile players like Andy Murray and Marion Bartoli, over their handling of the issue.
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On Monday, the ATP issued a statement saying they would now be investigating the matter since the Shanghai incident happened during one of their tournaments.
“The allegations raised against Alexander Zverev are serious and we have a responsibility to address them,” ATP CEO Massimo Calvelli stated.
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“We hope our investigation will allow us to establish the facts and determine appropriate follow-up action. We understand Zverev welcomes our investigation and acknowledge that he has denied all allegations.
“We will also be monitoring any further legal developments following the preliminary injunction obtained by Zverev in the German Courts.”
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The ATP (Association of Tennis Professionals) is the governing body for men’s tennis and players hold a 50 per cent stake in it.