Admittedly, just as in her thrilling third-round match against Sloane Stephens, Konta did it the hard way by coming from a set down.
Kvitova had not changed her winning tactics - that wasn't the issue. "It's nice to be in the quarter-finals of a slam again".
Victor here in 2011 at just 21, Kvitova lifted the title again three years later.
A bit of the zip had also gone out of her shots, which was perhaps unsurprising given the welly she put into the first set.
The muscles in her left forearm are so badly strained that she is not able to practise; she is merely taken out of metaphorical bubble-wrap for matches like the tennis version of Ledley King.
The British player, though, suffered no such nerves when presented with two more on her following service game. Ten of Djokovic's last 11 completed grand slam victories have been completed in straight sets. That was a long gruelling match for her though running to nearly two and a half hours.
Yet for all her wilts and capitulations, there is a fighter in there.
The 29-year-old Czech sixth seed, in the fourth round for the first time since she won the second of her titles in 2014, bows out leaving just two of the top 10 seeds remaining, Simona Halep and Elina Svitolina. She was unfortunate with a net cord that dribbled over but strong play from Kvitova took her to set point, and the home favourite dragged a forehand wide.
Konta looked supremely confident, and no wonder given she had won 13 of her last 14 matches that had gone to a deciding set. The umpire tried to call the second out, but Hawkeye said "bullseye". The ability to fight back has become a feature of her game this year. The Brit played a fairly even match of 22 winners to 21 unforced errors, and will be the favorite against Strycova tomorrow.
Despite a nervy ending, Konta will undoubtedly be delighted to continue her good form at her home Grand Slam tournament, reaching the last eight for the second time after losing in just the second round previous year. The way it went from 5-2 to 5-4 was very much on Petra's racket.