"If we had gone five sets I don't know how long we would have played," said Ruud on court Philippe Chatrier.
He next faces either Dane Holger Rune in a re-match of last year's quarter-final, or Argentina's Francisco Cerundolo.
Jabeur moved into the quarter-finals at Roland Garros for the first time with a 6-3 6-1 win over American Bernarda Pera and hoped that the romantic atmosphere of Paris will help her quest for a maiden Grand Slam title.
The Tunisian had reached the Australian Open quarter-final in 2020 and finished runner-up to Elena Rybakina and Iga Swiatek in the Wimbledon and U.S. Open title clashes last year.
"For now, I just want to take it one match at a time," added Jabeur.
Persons:
Roland Garros, Bernarda Pera, Benoit Tessier PARIS, Casper Ruud, Chile's Nicolas Jarry, Ruud, lanky claycourt, Jarry, Philippe Chatrier, Dane Holger Rune, Francisco Cerundolo, Jabeur, Elena Rybakina, Beatriz Haddad Maia, Sara Sorribes Tormo, Maria Bueno, Haddad Maia, Bueno, Daria Kasatkina, Ukraine's Elina Svitolina, I've, Kasatkina, Elina, Sabalenka, Svitolina, Shrivathsa Sridhar, Christian Radnedge
Organizations:
Jabeur, Bernarda, U.S, REUTERS, Tunisian, Wimbledon, Twitter, Thomson
Locations:
Paris, France, Tunisian, Iga, Belarusian, Ukraine