Stefanos Tsitsipas was seen by Patrick at age 15 on … Youtube. Since then, he has regularly trained at Mouratoglou Academy and has made it his family’s home base. In 2021, Stefanos reached a career-high of No. 3 in the World in the men’s singles rankings. From a kid whose dream was to stun the Big 3, Tsitsipas became the youngest player to ever defeat Novak Djokovic, Roger Federer, and Rafael Nadal in 2019. Although Stefanos continues to be coached by his father Apostolos, he has a special relationship with Patrick, who acts as his mentor, and works closely with Mouratoglou coaches: Frederic Lefebvre (fitness) and Louis Fresneau (physio).