The US Open uses replay technology on court, but the USTA destroyed video evidence in Genie Bouchard's US Open locker room fall, her attorney charges.

The latest twist in Bouchard's ongoing civil suit against the USTA came on Friday.

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Bouchard’s lawyer, Benedict Morelli, charges the USTA with "knowingly and willfully" destroying security camera video footage in the case that could support his client's claim of negligence in the case.

"(Bouchard) respectfully requests that the court find that defendants knowingly and willfully destroyed security camera footage relevant to plaintiff's claims in this case, despite having been notified well in advance to preserve any such evidence," attorney Morelli wrote in a filing with New York Eastern District Court, reports AFP.

The USTA has not yet responded.

In September, 2015, Bouchard fell in the US Open locker room and suffered a concussion that forced her out of the US Open.

Suffering from dizziness, Bouchard was forced to concede a walkover to her scheduled fourth-round opponent, Roberta Vinci, and pull out of her doubles and mixed doubles matches at Flushing Meadows.

The 2014 Wimbledon finalist subsequently sued the USTA, alleging that her fall on September 4, 2015, was caused by a slippery substance on the tile floor of the training room located inside the US Open locker room.

Bouchard's suit seeks unspecified damages and charges the USTA is responsible because it failed to keep the locker room floor in a "safe and suitable condition."

Genie's attorney previously told ESPN the USTA has indicated they wanted to settle the case out of court, but suggests the Tennis Association's offer was "unrealistic."

"They have indicated that they wanted to settle," Morelli said, according to ESPN. "We didn't talk specific-specific, but let's just say their side of the conversation was unrealistic."

In her US Open return last August, Bouchard fell in the first round to Katerina Siniakova.

The US Open made history as the first Grand Slam to use Hawk-Eye replay technology in 2006.

Photo credit: Christopher Levy