Five-time champion Venus Williams reached the Wimbledon semi-finals for the time since 2009 with a straight-sets win over Yaroslava Shvedova.
Eighth seed Williams - the oldest Grand Slam semi-finalist for 22 years at 36 - beat the world number 96 from Kazakhstan 7-6 (7-5) 6-3.
The American will next face German fourth seed Angelique Kerber, who beat Romania`s Simona Halep 7-5 7-6 (7-2).
Serena Williams plays Russian Anastasia Pavlyuchenkova later on Tuesday.
Slovakian 19th seed Dominika Cibulkova and unseeded Russian Elena Vesnina complete the quarter-final line-up.
`I love playing the game` - Venus
Venus Williams showed she remains a real threat on the All England Club grass with an impressive win over unseeded Shvedova.
The champion in 2000, 2001, 2005, 2007 and 2008 made it through to her first Grand Slam semi-final since the 2010 US Open.
At 36, she is the oldest major semi-finalist since Martina Navratilova finished runner-up at Wimbledon in 1994.
"I love playing the game," Williams told BBC Sport. "When you`re winning matches it makes it that much sweeter."
The American, who played her first Wimbledon in 1997, recovered from losing an early break to win the opening set tie-break from 5-2 down.
She then dominated the second set, racing into a 5-1 lead and holding off signs of a Shvedova comeback to serve out the win.
"What a tough day on the court," Williams added. "The tie-breaker, it felt like she would win. I felt like my opponent was on fire.
"I felt like the crowd enjoyed all the great points. She got them involved in the last game. We gave them good tennis today."
Jump media playerMedia player help
- Shkodran Mustafi and Lucas Perez to have Arsenal medicals
- Hope Solo: USA goalkeeper suspended for six months for `cowards` comment
- Tokyo Olympic medals may be made from recycled smartphones
- Rio Olympics 2016: Spectacular closing ceremony as Olympic flag goes to Tokyo
- The bizarre psychology of the bronze medal win
- Rio Olympics 2016: Team GB athlete `robbed` at Games after night out
- Metallica performs national anthem at the Stanley Cup Final (VIDEO)
- Christian Benteke: Liverpool reject Crystal Palace bid of £30m
- Arsenal target Alexandre Lacazette `won`t refuse offers`
- 10 Biggest Celebrity ★ Fitness Body Transformation