Johanna Konta beat Romanian second seed Simona Halep in a thrilling match to become Britain's first female Wimbledon semi-finalist since 1978.
Sixth seed Konta fought back to win 6-7 (2-7) 7-6 (7-5) 6-4 and match Virginia Wade's feat of 39 years ago.
The 26-year-old goes on to face 37-year-old American Venus Williams, a five-time champion, in the last four.
Halep's defeat means Czech Karolina Pliskova will be the new world number one in the next rankings.
The Romanian, 25, would have replaced Germany's Angelique Kerber with victory over Konta.
Andy Murray could give Britain a second singles semi-finalist when he takes on American Sam Querrey on Wednesday.