Bolt's path to the third round may be the most unique of the trio. The 26-year-old was ranked No. 304 when he quit the sport in March 2016 after losing to a player ranked in the 1,300s. He took up employment in a fencing construction company and enjoyed a stint playing Aussie Rules Football before rediscovering his love for the game. His hiatus lasted nine months.
"I feel lucky. When I stopped, that could have been my life," the world No. 155 wrote in a personal essay for the ATP. "I could be wilting away in the heat putting up fences right now. That’s a career path I would not have done well in, that’s for sure. Leaving tennis was the best thing I ever did."
Meanwhile Popryin finds himself in the third round by way of Dominic Thiem retiring injured on Wednesday. The world No. 149 was up 7-5, 6-4, 2-0 against the No. 7 seed.
"I didn't really feel much pressure, to be honest," Popryin said. "I just wanted to go out there and enjoy the moment, just soak in the experience really."