He, thereby, reached his 13th semi-final in Monte-Carlo on the back of his 66th win in the French principality.
This is published unedited from the ANI feed.
Meanwhile, Nadal, who is yet to drop a set this clay season, is scheduled to cross the swords with Bulgaria's Grigor Dimitrov for a place in the final.
OPCW inspectors to be allowed in to Douma
It was not known who carried out the attack, with Pentagon spokesman Heather Babb saying: "There are no USA or coalition operations in that area".
"But then one day trying things, trying treatments, one day things are going better, no?"
"In our sport, there is not much time to stop and think about the things that have happened or not happened". Nadal has won nine of 11 career meetings to date, though Nishikori took the most recent matchup - the bronze medal match at the 2016 Rio de Janeiro Olympics.
While Nishikori produced a spirited performance to clinch a 6-4, 6-7 (1-7), 6-3 win over Croatia's Marin Cilic in their last-eight clash, Zverev stormed into semi-finals with a 4-6, 6-2, 7-5 win over France's Richard Gasquet. But he needed treatment on his right knee after the first point of the next game, and was broken straight back.
It looked a straightforward afternoon for the 31-year-old Spaniard when he clinched the first three games but Dimitrov worked his way back with a quick break to make it 3-3.
Allison Mack, 'Smallville' actress, charged in federal court with sex trafficking
According to federal prosecutors, Mack has been indicted on charges related to sex trafficking and forced labour. Fox News reports Mack was arrested for her efforts on behalf of an alleged sex cult run by Keith Raniere .
The 16-time Grand Slam champion wrapped up the set with a whipped forehand onto the line. "Little bit sore still".
But the former world number four, now ranked 36, did enough to wear down a exhausted Zverev who came through a late-night thriller with Richard Gasquet on his 21st birthday on Friday.
If his form in Monte Carlo is anything to go by, Rafael Nadal will once again be a serious force to be reckoned with at Roland Garros next month. He beat Nadal in their last encounter two years ago to take the bronze medal at the Olympic Games in Rio de Janeiro.
"I'm sorry for him, because he's a good friend. But, you know, to see him this week, it looks a little bit hard", added Nishikori.
Gene Change May Have Helped Indonesia's Deep-Sea Divers
Spleens were larger in the Bajau people whether they were regular divers or not, and further analysis of their DNA revealed why. For Bajau free divers, the lack of oxygen is more acute, so it's less like chronic hypoxia and more like sleep apnea.