Djokovic then stormed through the tiebreaker 7-4 to claim the third set. The victor will face U.S. Open champion Sloane Stephens in the quarterfinals. Zverev secured an early break and never looked back, winning 6-1 6-2 in the last two sets to take the match.
Nishikori failed to make a huge comeback as the Austrian won by a 6-2 6-0 5-7 6-4 score. "It's the best, a five-set match". Rafa Nadal goes in search of his 11th French Open title but don't count out Novak Djokovic - and what about the in-form Alexander Zverev?
More likely, he won't fuss too much over the details, including that Dzumhur entered the French Open with a losing record this year.
4th seeded Ukrainian Elina Svitolina left the tournament on the third round.
Seeded winners in the women's third round: No. 1 Simona Halep, No. 3 Garbine Muguruza, No. 7 Caroline Garcia, No. 10 Sloane Stephens, No. 12 Angelique Kerber, No. 16 Elise Mertens, No. 25 Anett Kontaveit, No. 28 Maria Sharapova. Nishikori leads him 2-0 in head-to-heads.
Stephens faced no break points.
Zverev was his own worst enemy in what at times was a nightmare outing, as he hit 73 unforced errors, dropped serve seven times, and served up seven double faults.
Lajovic has enjoyed a fine renaissance in the clay-court season, reaching the quarter-finals in Madrid - beating Juan Martin del Potro along the way, while being narrowly beaten by Dominic Thiem in the semi-finals in Lyon a week prior to Roland Garros.
Dzumhur, the world number 29, was in the middle of a tough five-set match at the French Open, against second seed Alexander Zverev. He missed an easy forehand on his first match point, biting down on his fingers in frustration.
The German then saved a match point on his serve to make it 5-5.
Still seeking a maiden grand slam title, Halep has lost two heartbreaking finals at the French Open, too, to Maria Sharapova in 2014 and Jelena Ostapenko previous year.
China warns USA trade talks will be void if Washington imposes sanctions
He said Washington would use its move on Tuesday to slap punitive tariffs on Chinese imports as a bargaining chip. The statement was released following the conclusion of talks between U.S.
The second seed, however, seemed unaware that the men's professional tour does include a tournament in Yorkshire - and it starts in just a fortnight's time.
Two of the top four seeds nearly fell in the French Open third round but Alexander Zverev saved himself from a big loss after Grigor Dimitrov was swept out.
Djokovic has now made the last 16 of a Slam for the 43rd time, tying Jimmy Connors on the all-time list, second only to Roger Federer's tally of 60.
"It was awesome, a very high-level match", Zverev said in the interview on Court Philippe Chatrier.
"I still have a little bit of time".
A reporter wanted to know whether he thinks that shot of his is more like Gustavo Kuerten's or Stan Wawrinka's, a pair of past French Open champions.
Her feat means the 13th-seeded American has now reached the last eight at every major. With that said, I just can't bet against the German. "Hopefully big things can happen here". Finally, #12 seed Sam Querrey lost to Gilles Simon in four sets after quickly winning the first 6-1.
They were playing their match later Sunday on Court Suzanne Lenglen. Eighth-seeded David Goffin of Belgium leads Frenchman and No. 32 seed Gael Monfils, 6-7 (6), 6-3, 3-2, while 15th-seeded Lucas Pouille of France dropped the first two sets to Russian Karen Khachanov and trails 3-6, 5-7, 1-1. He was two points from the match but Dimitrov won back to back points to extend the match.
Dzumhur had match point on Zverev's serve at 5-4 in the final set.
Seconds later, she threw her head back after serving a booming ace that flew past Buzarnescu before she could react.