"For sure I didn't start in the best possible way," said Sinner, who has lost only one set in his three matches.
"It's never easy playing against a player who you've never played against so it was something new for me."
The duo traded breaks early in the fourth set before Sinner regained focus to seal victory and he will next play Colombian Daniel Elahi Galan or Swede Mikael Ymer.
"The best thing when you lose early at Roland Garros is you have a lot of time to prepare on grass," said Sinner, who fell in the second round of the French Open last month.
"This was the case of my journey until here this year but for sure every match has its story.
Persons:
France’s Quentin Halys, Toby Melville LONDON, Jannik Sinner, Frenchman Quentin Halys, Sinner, Nicola Pietrangeli, Matteo Berrettini, Halys, you've, Daniel Elahi Galan, Swede Mikael Ymer, Roland Garros, Shrivathsa Sridhar, Ed Osmond
Organizations:
Lawn Tennis, Croquet Club, Wimbledon, Thomson
Locations:
London, Britain, Bengaluru