Julia Apostoli, Tsitsipas' mother: "Two or three kids hitting Stefanos".

Julia Apostoli, the mother of Stefanos Tsitsipas, recently appeared on "To Proino" and took the opportunity to talk about her son's visibly difficult childhood.

Revealing that the Greek had been the victim of bullying, she explained: "He was a very quiet and shy child.

Because of sport, he would skip school and the kids he had in class couldn't be considered friends because they treated him so badly.

There were two or three kids who hit Stefanos.

It wasn't easy for him at the time, but he got over it because he played tennis and his spirit kept him going.

That helped him a lot."