Former world No. 1 Roger Federer turned 40 last August and he was grateful that he was able to hit 40 by being surrounded by his friends, family and his team. Apart from being a tennis pro and one of the greatest players in tennis history, Federer is also a family man. With his wife Mirka, Federer has four kids. “In summer, I was able to celebrate my 40th birthday, marking the mid-point of my life with family, friends and my team who have supported me throughout my tennis and private life.I’m grateful everyday for the people that have helped me get to where I’m today and have guided and provided me insights across many difficult decisions. Seeing …