Maria is 34 years old and is also contesting the first major semi-final of her career.
The German world No.103 returned from a second maternity leave less than a year ago and is travelling the tour with her husband and two daughters, enjoying every second of the adventure.
Maria notched some big wins en route to the semis, taking out No.5 seed Maria Sakkari and saving two match points before dismissing former Roland-Garros champion Jelena Ostapenko.
Maria defeated Jabeur in their only previous tour-level main draw meeting, in Linz in 2017, but the 27-year-old Tunisian was the victor in their two qualifying clashes at the US Open in 2014 and in Beijing in 2018.
Jabeur dropped her first set of the tournament in her win over Marie Bouzkova in the quarters and has spent three fewer hours on court compared to Maria.
The third seed has lost her serve just eight times in 47 service games while Maria has been broken 19 times through five matches.