Federer or Nadal have won each of the past six major tournaments, equalling their second-longest stretch of dual dominance, their other six-slam streak came way back in 2008-09.
Nadal's form never wavered, though, and soon enough he was celebrating his 17th Grand Slam title overall, second among men only to Roger Federer's 20.
The 32-year-old Spaniard is 10-0 in finals in Paris, winning the trophy every year from 2005-08, then again every year from 2010-14, then again in 2017.
Halep added Grand Slam trophy No. 1 to her No. 1 ranking, coming back from a set and a break down to beat Sloane Stephens 3-6, 6-4, 6-1.
Halep assured herself of retaining the No. 1 ranking and reached her third final in Paris.
With his good run at Roland Garros, Del Potro is now guaranteed to return to the top four in the rankings for the first time in more than four years.
Halep next faces third-seeded Garbine Muguruza, who thrashed Maria Sharapova 6-2, 6-1 in a matchup of past French Open champions.
The 13th seeded Indo-French combination went down 6-7, 2-6 to eighth seeds Nikola Mektic of Croatia and Austria's Alexander Peya in an hour and 32 minutes.
Their matchup provides a contrast in styles: Keys is a big hitter whose serves and forehands are the keys to her success; Stephens covers every inch of the court as well as anyone.
The former world number one Djokovic took two hours and 25 minutes to get into the last eight at Roland Garros for the 12th time on Sunday.
The 10th-seeded Stephens was a 6-2, 6-0 winner against No. 25 Anett Kontaveit of Estonia in 52 minutes, while No. 13 Keys beat No. 31 Mihaela Buzarnescu of Romania 6-1, 6-4 in 65 minutes.
Through 14 years and 21 matches, Serena Williams vs. Maria Sharapova has evolved into one of the most enduring and multi-faceted, if also lopsided, rivalries in women's sport.
Both Serena and Venus, who have won 14 Grand Slam doubles' titles, last won the French Open together way back in 1999.
Marco Cecchinato earned the right to face Djokovic for a spot in the semifinals at Roland Garros by eliminating the No. 8-seeded David Goffin 7-5, 4-6, 6-0, 6-3 on Sunday.
The head-to-head history is overwhelmingly in Williams' favour as the American has won 19 of 21 meetings against Sharapova, including 18 in a row.
Nadal is gaining momentum in his bid for a record-extending 11th title at Roland Garros, and Gasquet never looked remotely like stopping him.
It's the third time that Bopanna has reached quarterfinal stage at Roland Garros. He made it to the last-eight pairs in 2011 and 2016 also.
Top-ranked Simona Halep, third-seeded Garbine Muguruza and two-time champion Maria Sharapova all powered into the French Open's third round with straight-set victories on Thursday.
Bopanna and his French partner Roger-Vasselin began their Roland Garros campaign with a comfortable win over the American team of Taylor Fritz and Frances Tiafoe.
Returning to the place where he claimed the second of his three Grand Slam titles did not help Wawrinka shake off his poor form.
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