Muchova continues to be troubled by an issue which has affected her throughout the 2021 season.
The Czech player said the break 'helped' her secure a shock win at the Grand Slam.
The Czech world No.27 has sent shockwaves through the tennis world by upsetting the world number one and home favourite.
Karolina Muchova produced a remarkable second set comeback to defeat Karolina Pliskova at the Australian Open.
Tsvetana Pironkova extended her remarkable run at the 2020 US Open (her first event in three years) with a 6-4 6-1 win over Donna Vekic.
Naomi Osaka survived a stern examination of her abilities to earn an encouraging 6-7(5) 6-4 6-2 win over Karolina Muchova at the Western & Southern Open....
Elina Svitolina got the better of Karolina Muchova in two rollercoaster sets to progress to her first Grand Slam semi-final.
