A video exists of the incident involving Adrian Sutil and Eric Lux, according to the Swiss newspaper Blick.
The internal security footage at the M1nt nightclub in Shanghai could prove decisive in Force India driver Sutil’s legal defence as Renault co-owner Lux pushes criminal charges.
Sutil, whose entire formula one career could hang on the outcome of the saga, insists he unintentionally cut Lux’s neck with a broken glass during a post-race party attended also by Sutil’s close friend Lewis Hamilton.
Lux was wearing a bandage in Turkey two weeks ago to cover more than a dozen stiches, and Bernie Ecclestone told Blick: "The victim was damn lucky."