Aiming to become the third player to win the Monte-Carlo title at least three times in a row, the second seed awaits Nicolas Jarry or Alexei Popyrin.
Jabeur, a quarterfinalist the past three years in a row and a finalist in Charleston last year, defeated Dolehide in one hour and 21 minutes.
Day 3 of the WTA 500 competition saw the second seed Jabeur make it through to the round of 32 thanks to a comfortable win over Lesia Tsurenko.
The Spanish teenager made his decision public via social media, where he said that he was suffering from post-traumatic arthritis and has muscular discomfort in the spine.
Gauff and Pegula have now won two championships this year after their first was won in a triumphant title defence at Doha in February.
After losing their first two encounters, Rybakina finally defeated the American. With a 21-3 record, she is currently leading the tour in matches won in 2023.
Fritz recorded eight aces and returned three out of four break points in the tie. His win percentages on the first and second serves were 56% and 62% respectively.
For van de Zandschulp, it is a momentous occasion as he recorded his first ever top-five win, and will be now looking to go the distance in Miami with his new found confidence.
Rublev recorded an outstanding 12 aces in the match and committed not a single double fault.
Ryabkina had let a set and a 4-1 lead slip but recovered quite well to win the match and set up a last 32 tie clash against Spaniard Paula Badosa.