Wawrinka spoke about how much he was taught by the Swiss legend and called him 'a big brother' while on the circuit.

“Roger taught me a lot. When I got on the tour, he was already number one in the world and had won several Grand Slams. I have always enjoyed learning from others. I owe a lot of Grand Slam titles to the “Big Three," said Wawrinka.

"I am certainly the player who trained the most with them. I watched a lot of their games. At the start of my career, I was able to count on Roger’s advice before I faced the best. He was like a big brother on the circuit. I like Roger’s calmness and the importance of living in the present moment. His days are ultra-busy, but he remains incredibly calm."