Kristina Mladenovic overcame a poor start to beat wildcard Chloe Paquet in an all-French first-round encounter at the Lyon Open on Tuesday.
Mladenovic racked up 14 double faults but stormed back to beat her 166-ranked compatriot 1-6 6-2 6-4.
Half of those double faults came in a one-sided opening set, which Mladenovic put behind her to seal victory in two hours and 12 minutes.
The second seed, who will now face Anna-Lena Friedsam, said: "It was definitely not an easy match to face a countrywoman and also a friend, even though I don't know as much about her in the tennis - like, how she plays.
"It's never easy to start a tournament and we never played each other before, so it wasn't easy.
"It was very far from perfect but I'm just pleased with how I stayed calm and composed and how I fought through to find solutions to get the win."
There were no surprises on the second day of main-draw matches, with seventh seed Daria Kasatkina defeating Pauline Parmentier 6-2 5-7 6-4.
Jil Teichmann dumped out Clara Burel 6-4 6-3, while Viktoria Kuzmova, Camila Giorgi, Tereza Martincova and Viktoriya Tomova also progressed.