World number one Nour El Sherbini knocked defending champion Sarah-Jane Perry out of the Black Ball Squash Open to move within two matches of a maiden title in Cairo.
The Egyptian gained revenge for losing to Perry in December's Black Ball Squash Open final, triumphing 11-9, 5-11, 11-7, 11-6.
El Sherbini - a two-time runner-up in this event - needed 46 minutes to beat the Englishwoman, and will go from playing the 2018 Commonwealth Games silver medalist in the quarter-finals to the gold medalist in the semi-finals.
New Zealand's Joelle King is up next for El Sherbini, after an impressive 11-7, 11-9, 11-8 win against fourth seed Hania El Hammamy.
"I’m ecstatic with that performance and to beat a player like her in three, but the job’s not done, so I don’t want to relax too much and get too excited when I’ve got another match to play," said King following the convincing win over the 20-year-old Egyptian.
Another Egyptian - Salma Hany - is through to a first Professional Squash Association World Tour Platinum semi-final following a 22-minute win against Olivia Blatchford Clyne.
The American, who received a bye in the last round when Egypt’s second seed Nouran Gohar was withdrawn for breaching COVID-19 protocols, was off the pace from the outset and lost 11-4, 11-4, 11-2.
The other quarter-final was the pick of the matches, lasting more than an hour and going the distance.
Amanda Sobhy of the United States emerged victorious, outlasting third seed Camille Serme of France 12-14, 11-4, 15-13, 9-11, 11-7.
Sobhy and Hany will meet in the second semi-final tomorrow.