The Australian said he saw nothing to change his opinion that the Spaniard is untouchable at Roland Garros.
Leander Paes and Meghann Shaughnessy survived a scare but Sania Mirza and Fabrice Santoro were knocked out of the mixed doubles at the French Open.
The Indo-French pair broke no sweat in defeating Vania King of the US and Frantisek Cermak of the Czech Republic 6-2 6-0 in their opening encounter at Roland Garros on Friday.
Williams surrendered her Wimbledon crown last July when she lost to the 22-year-old Serb in the third round.
Roger Federer moved into the third round of the French Open in the nick of time on Wednesday with a 6-1 6-2 7-6 defeat of wildcard Thierry Ascione.
Maria Sharapova showed there was no room for sentiment on Wednesday when she led a trio of Russian seeds into the second round of the French Open.
The Spaniard plays Juan Martin del Potro of Argentina in the first round on Tuesday.
Rain played spoilsport at the French Open for the second day running when a torrential downpour stopped the action for a second time on Monday.
The Swiss needs to win in Paris to join Don Budge and Rod Laver as the only men to hold all four slams at the same time.
A pep talk from dad Richard and a timely downpour over Roland Garros rescued Serena Williams from an embarrassing first-round exit at the French Open on Sunday.
When action begins on Sunday atthe French Open, Nadal will be aiming to become the first man to win a hat-trick of French Open trophies in his first three visits to Paris.
The move is designed to favour 2002 Wimbledon champion Lleyton Hewitt and this year's runner-up Mark Philippoussis.
Images from Day 11 of the 2021 French Open at Roland Garros in Paris on Wednesday.
Iga Swiatek clinched her second French Open title after defeating American teenager Coco Gauff
Former French Open champions Argentine Gaston Gaudio and Spaniards Carlos Moya and Albert Costa have all pulled out of Wimbledon because of injury.
They set up a clash with Samantha Stosur and Paul Hanley of Australia in the semi-finals which will be played on Thursday.
No wonder Roger Federer wishes he could jump into a time machine and go back through the years to have a shot at Rod Laver or Bjorn Borg.
The duo defeated French pair Stephanie Foretz and Nicolas Devilder to enter the second round of the mixed doubles at the French Open.
The 18-year-old is slated to meet French teenager Richard Gasquet in the third round itself.
In response to questions about scheduling, Mauresmo said men's matches have more 'appeal'.
Australia's Lleyton Hewitt is a major doubt for this month's French Open after breaking two ribs in a fall.
The Australian rejected the French Open wildcard to concentrate on his preparations for Wimbledon
How the winners celebrated on Day 11 of the French Open.
It will be the second time Nadal and Del Potro meet at Roland Garros. The previous match up saw the Spaniard beat Del Potro in straight sets in the opening round in 2007.
French Open champion Gaston Gaudio overcame a partisan crowd as he beat Chile's Fernando Gonzalez to win the BellSouth Open ATP tournament on Sunday.
Images from Day 5 of the 2021 French Open, in Paris, on Thursday.
American Williams, seeded 10th and competing in her 20th French Open, powered 22 winners and converted six of 13 break points as she picked apart the 60th-ranked Belgian in just over an hour.
Four-times champion Rafael Nadal was knocked out in the fourth round of the French Open, beaten 6-2 6-7 6-4 7-6 by Sweden's Robin Soderling on Sunday.
Roger Federer was lucky to keep alive his dream of winning a maiden Roland Garros crown and Venus Williams used a good night's sleep to spare herself from a French Open nightmare in the second round on Thursday.
The Indo-Belgian pair lost 4-6, 4-6 to Leos Friedl and Mikhail Youzhny in the men's doubles first round.
World number three Stanislas Wawrinka stormed back from a set down to beat German qualifier Mischa Zverev 4-6, 6-3, 6-3 and retain the men's title in Geneva on Saturday.
The Russian feels she is in much better shape than when she won the 2004 Wimbledon crown at the age of 17.