Viktoria Hruncakova and Tereza Mihalikova completed the surprise victory, surviving a late rally by Taylor Townsend and Ashlyn Krueger.
18-year-old Czech player Nikola Bartunkova has accepted a six-month suspension after testing positive for a banned substance earlier this year.
Muchova, the stylistic descendant of the eclectic Ash Barty, came painfully close to winning Roland Garros in 2023 and this year was within a makeable forehand volley of progressing to the US Open ...