Venus Williams has become the oldest WTA player ever defeat a world No. 1 as she knocked out Angelique Kerber to advance into the Miami Open semi-finals. She won the first three games of the second set - with Pliskova giving her racket a toss afterward - and then controlled the rest of the match.
British world No 1 Andy Murray is excited to see the progress made by Konta and will be keeping a close eye on how far she goes in the game.
Johanna Konta lived up to the bill as being one of the best "clutch" players on the circuit when she produced a stunning drop shot to break Venus Williams in the Miami Open.
Williams led 3-1 in the second set after breaking Konta's second service game, but the 25-year-old broke straight back and secured two more breaks in the latter stages of the second to eventually triumph 7-5.
The part-time Miami resident fought back against second-seeded Karolina Pliskova last night to win 5-7, 6-1, 6-1.
"You can write yourself off but I'm not writing you off", Cahill said.
Pliskova, who began the year with a title at Brisbane, was philosophical about her second semi-final loss of the month.
"I think that s the thing with Caroline: she never goes away".
"It wasn't my best game, but she deserved to win because she played really well tonight", said the German.
Venus Williams whacked a victor on her fifth match point, then spun and threw a celebratory fist toward her father, who watched from the front row while munching popcorn. Konta was an error machine for much of her last match and it didn't look like she had a chance to win after being down a set and a break.
"I would like to be No. 1", Williams said earlier this week. It incredible that even at this age, she can surprise the world by doing extraordinary things. This year Rome is scheduled to start in mid-May, so Keys will have to be playing her best by then in order to prevent a significant ranking slide.
Australian Open champion Federer, who also won at Indian Wells two weeks ago, is playing some of the best tennis of his career and appears completely recovered from a knee injury that kept him out of the second half of past year. "I was aggressive, and that's when I play my best".
"She always kept her nose ahead and was able to squeak out that first set and it was high quality stuff", Navratilova told BT Sport.
She is smashing records and the next landmark facing her in Grand Slams will be Wade's 1977 mark - the last British woman to reach a Grand Slam final when she won Wimbledon.
It is in those critical moments, when the result is uncertain and the pressure is at its most intense, that Konta has proved she has the fortitude to impose her will on any opponent who shows signs of self-doubt or uncertainty. "Two double faults at the end of the tiebreak and I miss all the balls".