In an interview as quoted by ATP Stefanos Tsitsipas's father Apostolos spoke about how he grew as a coach working with the Greek player. Apostolos said: "I was explaining that we can do a lot of things, but we need to consider seriously that it will take us five, six years to develop a young player.
But people, they're not really patient enough to wait, to invest money, invest time. You have to develop as an athlete, your body. You have to develop your mind... and you have to develop your technique. With Stefanos, even though I studied so much, I just feel that I know very few things.
You need to always be open-minded and ready to learn. Stefanos gave me such a chance to learn. I think he was the best university for me." On why he started seeking a career as a tennis coach, Apostolos added: “It was strange because nobody from my background was involved in tennis.
But I chose tennis, I don't know why. Actually, that's a good question”. Stefanos said: “It's a big honour to have him next to me by my side. I love him. He loves me. We have been together since the age of 12, travelling together. I appreciate that”.