Roland Garros champion Jelena Ostapenko is the only reigning Slam holder left in the draw, having taken the title in Paris a month ago. Of the other four major winners in the quarterfinals, Garbiñe Muguruza's last Slam trophy came a year ago at Roland Garros; Svetlana Kuznetsova's was eight years ago, at Roland Garros 2009; and Venus Williams's was nine years ago, at Wimbledon 2008.
Having overtaken sister Serena's record among active players for number of matches played at Wimbledon in the first week, Venus Williams is now just one win behind her total number of wins at SW19. A victory over Jelena Ostapenko today would tie the sisters on 86 - in the Open Era, only Chris Evert (96) and Martina Navratilova (120) have more.
Garbiñe Muguruza leads her head-to-head against Svetlana Kuznetsova 3-1, but today will be the first time the two play on grass. Kuznetsova won their first meeting in Madrid in 2015, but Muguruza has emerged on top in all three since for the loss of just one set.
In the 20th anniversary of Venus Williams's 1997 Wimbledon debut, the five-time SW19 champion will play her third consecutive player born in that year in Jelena Ostapenko today, having disposed of Naomi Osaka and Ana Konjuh in the two previous rounds. At 37 years and 29 days, Williams is the oldest player to reach this stage of Wimbledon since Martina Navratilova was runner-up in 1994 at 37 years and 258 days.
Jelena Ostapenko and Simona Halep's presence in the last eight marks the first time that both Roland Garros finalists have made the Wimbledon quarterfinals in the same year since 2007, when both Justine Henin and Ana Ivanovic reached the semifinals at The Championships.
Svetlana Kuznetsova is 0-3 in Wimbledon quarterfinals to date, and 5-10 in Slam quarterfinals overall. She is bidding to make her first major semifinal since winning Roland Garros in 2009.
Venus Williams is 8-3 in Wimbledon quarterfinals to date, and 20-16 in Slam quarterfinals overall. At the Australian Open in January, she snapped a nine-year drought between Slam finals since her Wimbledon title in 2008.
Three of Johanna Konta's four wins so far have seen the Brit exact revenge for a previous 2017 defeat: Hsieh Su-Wei had beaten her at Roland Garros, Donna Vekic had been the victor in the Birmingham final and she had lost to Caroline Garcia in Indian Wells. She gets another chance today: Simona Halep inflicted a 6-1, 6-3 defeat on Konta during the Fed Cup World Group II play-off tie between Romania and Great Britain in April. However, Konta leads the overall head-to-head 2-1, including a win in the Miami quarterfinals in March.
Jelena Ostapenko is the first woman to follow up her maiden Slam title with a quarterfinal run in the next Slam since Kim Clijsters reached the Australian Open semifinals in 2006.
Three players have reached the quarterfinal stage without dropping a set: Svetlana Kuznetsova, Simona Halep and CoCo Vandeweghe. Kuznetsova has dropped the fewest games, conceding just 21 in four matches; Johanna Konta has dropped the most, with 45.
CoCo Vandeweghe has faced the highest overall level of opposition en route to the last eight, with a ranking average of 43.5. The American is the only player to have beaten three Top 50 players so far.
Magdalena Rybarikova's quarterfinal berth marks the 10th straight year an unseeded player has made the last eight at Wimbledon. The World No.87 is the seventh lowest-ranked SW19 quarterfinalist ever, and only three lower-ranked women have made the semifinals: No.99 Gigi Fernandez in 1994, No.133 Zheng Jie in 2008 and No.134 Mirjana Lucic in 1999.
Having made British tennis history by becoming the first home quarterfinalist at Wimbledon since Jo Durie in 1984, Johanna Konta is now seeking to become the first British semifinalist here since Virginia Wade in 1978. Meanwhile, Jelena Ostapenko - the first Latvian quarterfinalist at Wimbledon since Larisa Savchenko-Neiland in 1994 - is bidding to become her country's first ever representative in The Championships' final four.
Magdalena Rybarikova holds a 2-0 head-to-head lead over CoCo Vandeweghe, and is yet to drop more than four games in a set to the American. One of those encounters was on grass - Rybarikova's 6-2, 6-1 victory in the second round of Birmingham in 2011 - and the other was six weeks ago, when she won 6-1, 6-4 in the first round of Roland Garros.
Our WTA Insider analysis breaks down each of the last eight contenders left in the draw.
Jelena Ostapenko's focus and mental fortitude in following up her Roland Garros title has been one of the revelations of the Wimbledon fortnight. The 20-year-old's coach, Anabel Medina Garrigues, has spoken about her charge being "in her own world" to Reem Abulleil for Sport360.
The women's draw has been notably open this year. Alyssa Roenigk discusses why the free-for-all has elevated the quality of the women's game for ESPN.com.
Great Britain has not had both a man and woman in the Wimbledon quarterfinals since 1973. Barry Glendenning looks at Johanna Konta and Andy Murray's contrasting approaches to their success for The Guardian.
Meanwhile, away from the exalted lawns of SW19, players are continuing to grind in humbler surroundings. Nicole Gibbs is blogging from Winnipeg for The Tennis Channel this week.
The No.1 ranking is on the line today: if Simona Halep wins her quarterfinal against Johanna Konta, she will seize the top spot. Look back at how she kept her chances alive against Victoria Azarenka in the fourth round and Peng Shuai in the third round.