Mirjana Lucic-Baroni turned back the clock almost two decades on Wednesday, as the evergreen Croatian outsider upset fifth seed Karolina Pliskova 6-4, 3-6, 6-4 for a stunning win into the Australian Open semi-finals.
The 34-year-old, who reached the Wimbledon final four as a teenager in 1999, was shocked by her undreamed-of accomplishment while playing through pain.
"I was just really thankful that I was able to do this today, that I was able to finish my match. I was really worried. I was concerned. I didn't know if I had it in me to finish it," Lucic-Baroni said.
"[My leg] started hurting pretty bad mid-match, especially towards the end. The fact that I was able to do it and so well at the end, I was really grateful.
"I'm still in the tournament, and I want to remain kind of calm and focused and give another really good performance tomorrow."
The Croatian took a lead of a set and a break over US Open finalist Pliskova in a tumultuous contest littered with 24 break points and 14 breaks of serve.
Lucic-Baroni almost doubled the number of winners of her Czech opponent, hitting 42 to Pliskova's 23.
She will now face six-time champion Serena Williams, who beat British ninth seed Johanna Konta 6-2, 6-3.
"It will be tough but I will do my best to recover, try to keep calm and enjoy every second out here," Mirjana Lucic said.
As a result of her stellar performance in Melbourne, Lucic-Baroni will return to the top 45 for the first time in years, as she relaunches a career interrupted by injury.