The decisive factors in the match were Gasquet's unforced backhand errors and the 37 winners Nadal hit, almost double what the Frenchman fired, as well as Nadal's efficacy while approaching the net (85 percent). Once in Basel we had a very tight match.
Dabrowski and Xu, the No. 5 seeds, needed just 63 minutes to complete their win over American Kaitlyn Christian and Germany's Carina Witthoeft.
As one of five official photographers working for the website of the French Open, Dubreuil has better access than normal press photographers, which allows her to shoot more intimate pictures.
Spain's Rafael Nadal entered the last 16 with a straight-sets win against local favourite Richard Gasquet. "When he plays on his backhand, he has an intensity which is monstrous", he said.
In other matches, Fabio Fognini beat Kyle Edmund 6-3, 4-6, 3-6, 6-4, 6-4, while Maximilian Marterer won 6-2, 6-1, 6-4 against Jurgen Zopp. He has yet to drop a set at this year's tournament. "He's a nice guy and, yeah, that's what I can say".
Halep has twice lost in the final at Roland Garros, including a year ago.
"Being in that round, winning good matches".
Sloane Stephens also advanced to the fourth round, but the 10th-seeded American had a much more hard time beating Italy's Camila Giorgi 4-6, 6-1, 8-6.More news: North Korea human rights violations should be addressed in summit talks
Play has begun under puffy clouds on Day 7 of the French Open, with No. 3-seeded Garbine Muguruza on Court Philippe Chatrier seeking a fourth-round berth against Samantha Stosur of Australia.
"He is very photogenic, for me he is the one to photograph", she said.
She and Sharapova were scheduled to play a fourth-round match Monday.
From being on the precipice of defeat when serving at 4-5 in the fourth set, the eighth-seeded Belgian then profited when Monfils lost his cool with the umpire after a warning for taking too much time between points.
Dubreuil, a keen tennis player from the age of six, was hooked, and told her parents she wanted to become a tennis photographer.
Kasatkina has beaten Wozniacki three times this year.
Isner had 17 aces and saved the only break point he faced in a tight contest, breaking Herbert's serve just once in seven attempts.
Their third-round match at the French Open on Saturday followed a familiar pattern: Nadal subjected Gasquet to a 6-3, 6-2, 6-2 pummeling. Sharapova next faces Serena Williams in what will be their 22nd career meeting.