Despite the difficulty this event had already occurred several times in the past: 9 times for men events and 40 times in women events in modern era.

**men records for modern era:**

 - Bjorn Borg and Rafael Nadal take this achievement 3 times each
 - Bjorn Borg in [1976 Wimbledon][1] and Rafael Nadal in [2017 Roland Garros][2] were the lowest ranking (4th) player to win a Grand Slam witouht losing a set
 - AUS open: 2 times
 - Roland Garros: 6 times
 - Wimbledon: 2 times
 - US open: never happened


**women records for modern era:**

 - women: Martina Navratilova and Serena Williams won a Grand Slam tournaments witouh losing a set 6 times each
 - the lowest ranking player to win a Grand Slam without losing a set was n.15th Marion Bartoli in [2013 Wimbledon][3] (her only Gran Slam tiltle just before her retirement)
 - AUS open: 8 times
 - Roland Garros: 7 times
 - Wimbledon: 10 times
 - US open: 15 times


[Here the updated wikipedia pages with the list][4]


It is interesting to notice that for Nadal this 2017 Roland Garros represents his personal career record for percentage of game won on game losts (116 GW vs only 35 GL => 76.8%)


  [1]: https://en.wikipedia.org/wiki/1976_Wimbledon_Championships
  [2]: https://en.wikipedia.org/wiki/2017_French_Open
  [3]: https://en.wikipedia.org/wiki/2013_Wimbledon_Championships_%E2%80%93_Women%27s_Singles
  [4]: https://en.wikipedia.org/wiki/List_of_Grand_Slam_related_tennis_records#Won_a_title_without_losing_a_set