Petra Kvitova said on Sunday that coming back from a set down to win her first title since suffering a career-threatening injury has given her added confidence ahead of Wimbledon, which starts on July 3.
Barty, who returned to the sport a year ago after switching to play professional cricket in Australia's Big Bash League, was playing in her first grass-court final.
That sets up her match with Australian Ashleigh Barty in Sunday's final.
So well has she been playing that it has become even more significant that this tournament is a Wimbledon warm-up event, for Kivitova is already beginning to suggest she can again do well at the grass court Grand Slam starting in nine days' time.
Petra had 2 break points in game 10 when Barty served for the opener, but the Aussie fends them off to grab the set by 6-4, moving closer to her second WTA crown.
Petra Kvitova took a big step forwards to convincing herself that she can make a full recovery when she reached the final of the Aegon Classic by outplaying her exhausted friend and Czech compatriot Lucie Safarova. I am sorry for her and hope she soon gets a bit better. Barty showed great poise after winning a match despite dropping the first set and was quite feisty on the return, producing four breaks.
"I'm obviously I'm in a very different place. So it's going to be a good battle for me". Paris was a bit weird and unusual and I couldn't play the best over there.
Barty said she was delighted to have won through to the final of the tournament. "I am happy that I am able to show good tennis here".
But the two-time Wimbledon champion is now one win away from a maiden Birmingham title after Safarova pulled out with a thigh strain at 6-1 1-0 down.
It's pretty remarkable how well Kvitova's recovered, and how she's managed to keep her focus so positive despite the terrible injury she suffered. So yeah, I think it's kind of a fairy tale.
Kvitova served out for the title in emphatic fashion - to love and ending with an ace - before celebrating, in her typically understated style, with a broad smile.
After an exchange of holds, the Aussie found a chance to recover in the fourth game, when a huge error from the net from Kvitova gave her a break point.
Vandeweghe injured a foot in her opening match which, she said, contributed to her tumble in the second set. Broady commented on her speed not just laterally but up to short balls which she then just nails.
There are not very many natural grass court players out there.