Muchova, enjoying a stellar campaign after dealing with a slew of injuries, including an ankle injury that forced her to retire from her third-round clash with Amanda Anisimova at Roland-Garros in 2022, has been a rising force on tour in 2023 - she entered Tuesday's showdown with a 21-7 record on the season.
It would be the 26-year-old Czech who kept the momentum rolling with a decisive 7-5, 6-2 victory over Pavlychenkova on Court Philippe-Chatrier on Tuesday, to reach a maiden Roland-Garros semi-final and second at the Grand Slams overall (also made 2021 Australian Open semis).
Her victory sets a last-four clash with either No.2 seed Aryna Sabalenka or Elina Svitolina.
Story of the match
It started as a closely-contested baseline battle, with Muchova edging in front by a break but failing to stretch her lead as the world No.333 drew a temporary line in the terre battue, saving five break points to hold for 2-3 before levelling up at three-all in the next game with a break of her own.
Another trade of breaks came, bringing the pair to 5-all, before Muchova turned on the jets and reeled off eight of the final 10 points of the set to take a 7-5 lead at the 60-minute mark.
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Muchova made it 16 of 20 points won as she cruised through the opening two games of set two, and the Czech would never look back.
Pavlyuchenkova struggled to win points on serve in the second set and Muchova saved the only break point she faced while serving for the match at 5-2. She would soon close out the contest in one hour and 38 minutes.