Top-ranked Ashleigh Barty beat Barbora Krejcikova 6-2, 6-4 on Friday to reach the semifinals of the Western & Southern Open.
Barbora Krejcikova, who also won the Roland Garros singles trophy earlier this year, and Katerina Siniakova were dominant from the word go.
Krejcikova will next face her doubles partner and Czech compatriot Katerina Siniakova.
Barbora Krejcikova said her rise to stardom may have begun at last year's Prague Open where she gained lots of experience in a three-set loss to Simona Halep last August.
Barbora Krejcikova is the first woman since Mary Pierce in 2000 to complete the singles-doubles titles sweep at Roland Garros.
A day after claiming her first singles Grand Slam crown, Barbora Krejcikova is back on court at Roland Garros aiming for a sweep of titles.
Anastasia Pavlyuchenkova knows the importance of mental strength as she is now in a better place - thanks to the work she has done on her cognitive approach.
French Open champ Barbora Krejcikova pays tribute to former coach Jana Novotna after conquering Paris
Barbora Krejcikova honored her former coach, Jana Novotna after winning the maiden Grand Slam singles title at Roland Garros.
Krejcikova, ranked 33 in the world and playing just her fifth main draw in a Slams singles event, triumphed 6-1, 2-6, 6-4 for a second career title.
She is just another modest star in a long line of young Czech women who have made the semi-finals or better at Roland Garros in the past decade.
For just the second time in the Open era, there are four first-time major semi-finalists in the women's singles, after the 1978 Australian Open.
Krejcikova, ranked 33 in the world, defeated America's Sloane Stephens, the 2018 runner-up in Paris, 6-2, 6-0 to record a ninth successive win on the tour.