Novak Djokovic said “pressure is a privilege” after keeping his Golden Slam bid intact at the Tokyo Olympics, where the decision of gymnast Simone Biles to withdraw from two events over mental health concerns has put the spotlight on athletes’ wellbeing. World number one Novak Djokovic is trying to become the first man to win all four Grand Slams and Olympic gold in the same year, and emulate the feat achieved by Steffi Graf in 1988. The Serb is thriving on the Olympic experience, mingling and posing for pictures with athletes from all walks of life in the village, cutting...