John De'Viana is accused of subjecting Monaei and Nephe to years of physical and emotional abuse
Monaei De'Viana, now 21, alleged her tennis coach father John humiliated her because he did not believe she was performing well enough during a training session.
She was aged "nine or 10" at the time, she said.
On another occasion she claimed her father was "hitting me around the head, shaking my head and screaming at me" after a tournament.
Manaei said her father put an L on her forehead with permanent marker
He was always coach, he was never actually dad
De'Viana, 55, is accused of subjecting Monaei and her sister Nephe, 19, to years of physical and emotional abuse in his effort to make them sporting stars.
Snaresbrook Crown Court heard Nephe was a poster girl for the Lawn Tennis Association and featured on their adverts alongside Wimbledon champion Andy Murray.
The alleged abuse ended when De'Viana split from the girls' mother in 2011, when the sisters quit tennis.
The alleged abuse ended when De'Viana split from their mother in 2011
The court heard how De'Viana took his daughters out of school to enforce gruelling all-day training regimes starting at 5.30am and only ending before the girls went to bed, the court heard.
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In police interviews Monaei said: "He was always coach, he was never actually dad.
"He was awful to me, I never missed him. I hated him all the time."
Describing the incident with the marker pen she said: "We had a training session and I think I wasn't performing that well.
Monaei claimed her father was more physically abusive to her sister
"He had written in permanent marker an L on my forehead and shut me in the caravan."
Monaei claimed her father was more physically abusive to her sister.
She alleged how she once saw her father drag her little sister, aged around 12, behind a curtain at a sports centre before hearing her muffled cries.
De'Viana, of Ilford, Essex, denies both the charges against him and claims his daughters made the allegations up.
The trial continues.