On Saturday, she drove Romania's world number one Simona Halep to distraction at Wimbledon, using her Pandora's box of drop shots, lobs, slices and wristy winners to claim a memorable 3-6, 6-4, 7-5 win on a mesmerised Court One to reach the last 16.
The Canadian and his Austrian opponent were forced off by darkness in the third set on Friday night but Raonic, beaten by Andy Murray in the final in 2016, secured a quick break to take the third set before dominating the fourth to win 7-6 (7/5) 4-6 7-5 6-2.
Hsieh is set to play the last-16 round against Slovakia's Dominika Cibulkova, world number 33, who eliminated world number 15 Elise Mertens of Belgium.
Halep gave credit to Hsieh, the world number 48 having already come from a set down prior to her dramatic late comeback. She stayed there for every point. She will also force Halep to step in and dictate, perhaps more than the Romanian is comfortable with.
There were 13 breaks of serve overall in a seesaw contest and Halep took the first set after building a 4-2 lead.
"Body just didn't feel right", Tiafoe said. The recently crowned French Open champion did not crumble despite losing the last five games of the third set.
Instead of rushing her second serve, Hseih stepped away from the line, looked into the stands and motioned to the crowd like a cheerleader before a big fourth down, begging the fans to lend her their energy.
Asked how she would celebrate her success, the quirky Hsieh revealed her love of checking out London's gastronomic delights.
"This year I have tried to enjoy more, not just tennis but life, food, strawberries and cream, lobster", said the 2013 Wimbledon doubles champion. "I had match point", Halep said.
The Belgian, ranked number 47 in the world, knocked out defending champion Garbine Muguruza in round two. I am too exhausted. Only one of the top 10 seeds will be in action in Week 2: No. 7 Karolina Pliskova. 'I will not find the excuses about this match, she deserved to win, but still, I'm sad about myself today, ' Halep said.
Former finalist Angelique Kerber advanced to the fourth round at Wimbledon without facing a break point after beating 18th-seeded Naomi Osaka 6-2, 6-4. In total so far, she has spent just over two and a half hours on the court at this year's Wimbledon.
"I just believe that I was not very positive on court".
Explosive Nick Kyrgios, fresh from a social media row with former women's champion Marion Bartoli after she accused him of squandering his talents, plays Japan's Kei Nishikori.
100 military aircraft to fly over Essex
Higgins before visiting an Irish emigration museum, a technology startup hub and Trinity College, Ireland's oldest university. She doubled back towards the child and shook his hand, before breaking out in a laugh as the little boy looked on, unsmiling.