The only player to win two Olympic singles titles has a tough opener against Felix Auger-Aliassime, while Novak Djokovic continues his bid for the ‘Golden Slam’ against Bolivia’s Hugo Dellien. His fellow Wimbledon champion, Ashleigh Barty, begins her campaign against Spain’s Sara Sorribes Tormo, with home favourite Naomi Osaka making her return to action by playing Zheng Saisai of China.