Zheng held off Sebastian Korda’s comeback bid, knocking out the former quarterfinalist, 6-4, 6-4, 3-6, 6-7 (0), 6-3. The first five-set match of his career also marked Zheng's tour-level debut.
“I think in the fourth I was starting to feel it in the legs a little bit on the serve, but then just found a second wind in the fifth. Honestly, I'm feeling better than I thought than I would now, but I'm sure tomorrow I'm going to be a little bit sore,” Zheng told press.
The atmosphere of a show court like Kia Arena gave the rising American an additional source of inspiration to dig deep after struggling to get a read on Korda's serve in the third and fourth sets.
“The fans were starting to go crazy and just gave me that extra, I think, push to kind of close it out,” Zheng said.
“I think Billie Jean said it best, ‘Pressure is a privilege.’ This is what you work for. It's just a privilege to get a chance to step on Kia Arena for your first-round match at a Grand Slam, main-draw match at a Grand Slam.”