Kei Nishikori equaled his best Wimbledon performance as he advanced to the fourth round by beating Nick Kyrgios 6-1, 7-6 (3), 6-4.
The Latvian raced through the first set in 23 minutes and had won the first nine games before Diatchenko troubled the scorers.
That has become a familiar refrain for prominent women at Wimbledon.
"OK, now I feel more relaxed", Hsieh said of her mindset before that final serve, which Halep returned into the net.
"It's the third round of Wimbledon".
"I was leading the match, I was up, and I couldn't finish it", said the 2014 semi-finalist.
Del Potro pushed Novak Djokovic all the way in one of Wimbledon's most memorable semi-finals five years ago before his career was almost ruined by wrist problems, but he appears back to his best.
Juan Martin del Potro (5), Argentina, def. Benoit Paire, France, 6-4, 7-6 (4), 6-3.
"The ball is not bouncing two times in a row the same". I asked the chair umpire how is it possible he plays that shot if it didn't bounce twice.
This marked Hsieh's first career success in making it to the fourth round of the grand slam in London.
At 22, Khachanov is the youngest Russian in the fourth round since Mikhail Youzhny in 2002. Seven-time champion Serena Williams, the 25th seed, also remains in contention. Only one of the top 10 seeds will be in action in Week 2: No. 7 Karolina Pliskova.
Kerber will next meet Switzerland's Belinda Bencic, who ousted 27th seed Carla Suarez Navarro earlier Saturday.
Nadal hasn't dropped a set so far in the tournament.
De Minaur valiantly saved two match points before Nadal confirmed victory with a short, sharp volley. A year ago, the Spaniard lost at that stage.
Hsieh, the world number 48, battled back from 2-5 down in the final set and halted Halep who served for the match at 5-3 in the decider.
After three lengthy multi-deuce games to begin the final set, all breaks, the World No.1 appeared to assert her authority with a pair of statement holds that moved her ahead, 5-2.
At that point in the match - down 5-2 in the third - it looked as if Hsieh's comeback from a set down would swiftly end.
Jiri Vesely, Czech Republic, def. Fabio Fognini (19), Italy, 7-6 (4), 3-6, 6-3, 6-2.
I accept that it was an unprofessional attitude today.' Halep played 44 matches so far this year, and withdrawing from Eastbourne wasn't enough to be fully recharged: 'I think mentally I was exhausted.
They played together at the Laver Cup past year.
On Monday, Raonic will face 103rd-ranked Mackenzie McDonald of the United States for a quarterfinal berth.
Alyssa Roenigk is a senior writer for ESPN The Magazine and ESPN.com whose assignments have taken her to six continents and caused her to commit countless acts of recklessness. I was training and missed it. The 2016 champion, she returned to Wimbledon after skipping last year's edition due to pregnancy. "I have two match points", she said of that match.
Then there is Stephens, the US Open champion of past year who struggled for form immediately after winning her home Slam, losing in the first round of the next four tournaments (including the Australian Open).
Rafael Nadal of Spain returns the ball to Mikhail Kukushkin of Kazakhstan, during their men's singles match, on the fourth day of the Wimbledon Tennis Championships in London, Thursday July 5, 2018.
Novak Djokovic shrugged off a controversial call against him as the three-time champion hit back to beat Kyle Edmund 4-6, 6-3, 6-2, 6-4 in the Wimbledon third round on Saturday.