Canadian teen Bianca Andreescu was at a loss for words after her second stunning tennis upset in as many days.
Hsieh, who is looking to claim her fourth WTA Tour title in Auckland, faces 18-year-old world No. 152 Andreescu in today's semi-final after the Canadian rallied to beat Williams, 20 years her senior and a seven-time Grand Slam victor, 6-7 (1/7), 6-1, 6-3.
"My goal was only to qualify and maybe get a couple of rounds in but now I've beaten a couple of top players", she said. "It's such an wonderful feeling".
"It feels like a double dream", Andreescu said. I believed in myself to the end.
"What's really important for me is to stay in the present moment and I've been doing that all week and I'm beyond grateful right now".
Germany's Julia Goerges came back from a set down on Friday to beat Bouchard for a spot in the tournament semifinals.
But Andreescu's relative inexperience certainly didn't show as she used her power game but also showed her own ability to use deft touches to outsmart her opponent.
More airport security screeners calling off work amid shutdown
In the midst of the stress of traveling, it can be easy to forget the reason why there may be delays in the first place. That could end up hurting air travelers if security checkpoints turn into "chokepoints".
"I was like 'What is going on". "She's one of the best servers in the game".
"This week I've been playing a lot of different types of game styles". But I took control of that.
The contest against Wozniacki was Andreescu's first match in history against a top-10 player. She admitted she was tense.
"I've actually had this cough for three weeks now so I'm used to it", Andreescu said. At 5-3, I'm like "OK screw this".
"Canada has gone from being a minor nation in tennis", says Roth, "Sure, we've always had a few players who were good, to now being a legitimate force in the tennis world". "I'm just really happy and hopefully I continue like this for the rest of the season, for the rest of my career".
Goerges, ranked 14th in the world, raced out of the blocks, thumping winners and making few errors as she stormed through the first set. Goerges, who had suffered from lack of rhythm in that opening set, turned things around in the second and converted one of the four break-points she managed to create.
The world No 28, 33-year-old Hsieh is renowned for her crafty play, with an often expert ability to take the pace off the ball and use the angles of the court.