A miserable 24 hours for the high profile Brits got worse on Day 1 at Wimbledon.After withdrawals for Emma Raducanu and Jack Draper, British No. 1 Cameron Norrie crash out as 22-year-old Michael Zheng — the World No. 144 — produced the performance of his life on his Wimbledon debut.Zheng stunned Norrie in the first round of WimbledonAFPThe American qualifier won a fifth set tie-break in front of a partizan and packed crowd on Court 2 to advance to the second round.A 6-7 (7-9) 6-2 6-7 (2-7) 6-3 7-6 (10-4) victory marks the biggest of Zheng’s young career, in just his third appearance in a Grand Slam main draw.But he has pedigree in SW19, having reached the Boys Singles final in 2022. Speaking immediately after the four-hour match, he said: “Thank you so much to the crowd, it was an unbelievable atmosphere, this is what you dream of.“Honored to be part of a match like this… it means so much, this is what every kid dreams of. “Wimbledon is by far and away the best tournament. I think the people, architecture, everything.“I’ve always enjoyed my time here, and hope to keep the run going.”Norrie was the only British man to be seeded heading into SW19, and faced a relative unknown who headlined the list of successful qualifiers by downing Colton Smith to book his spot last week.Zheng, a two-time NCAA champion out of Columbia University, made his first major appearances at this year’s Australian and French Opens.On both occasions he came through qualifying, and he did so again last week at the Wimbledon qualifying tournament.Zheng took in the acclaim after beating Britain’s No. 1 at WimbledonGettyNorrie’s early exit capped a torrid 24 hours for injury-hit Brits at WimbledonGettyOn the biggest stage of his life, he took in the acclaim of the Court 2 crowd after securing a dramatic comeback win that keeps his dream Wimbledon debut alive.He will next face either Adolfo Vallejo or Nicolas Mejia in the second round, while third seed Felix Auger-Aliassime looms as a potential third round opponent.Zheng, from Chesapeake, Virginia, secured his first ever main-draw victory at the Australian Open in January, where he downed fellow American Sebastian Korda in five sets.He also competed at the French Open last month, and is the first Columbia alum to play in a tennis grand slam since Phil Williamson qualified for the US Open in 1993.How did Michael Zheng beat Cam Norrie on Day 1?Despite his inexperience on the biggest stages, Zheng was unflappable against Norrie.The Brit, a former Wimbledon semi-finalist, started well with a break of serve in the opening game.Norrie failed to capitalise on early momentum as he was beaten by ZhengAFPBut that was the only time during the four-hour epic that Norrie was able to break his 144th-ranked opponent. Zheng lost the opener in a tie-break, but battled back during a second set that saw Norrie hit just five winners, and make 11 unforced errors.The Brit took the third in another tie-break, but was pegged back once again in the fourth set. Zheng then let three break points go to waste in the fifth, but still sent it to a 10-point tie-break. Zheng dominated the tie-breaker to secure his first Wimbledon winAFPHe was phenomenal as he stood on the cusp of glory, and dominated the tie-break to win with the first of five match points.“It definitely wasn’t easy at times, I just do my best not to show it,” Zheng said of the back-and-forth battle. “It was definitely a little bit frustrating inside when I had been serving so well, then I got a couple of chances to break that I hadn’t really had during the match, and it didn’t go my way. “I just did my best to refocus and win the match after that. I didn’t want to give anything much attention.”Stay up to date on all things tennis across our talkSPORT platforms – subscribe to our YouTube channel for the latest news, opinion, exclusive interviews and our daily unfiltered, unscripted show ‘The S* Word, from 8am ET.