Good foundations
Pegula reached the semi-finals in Charleston and then the quarters in Madrid, before losing early in Rome, beaten by another American, Taylor Townsend.
A nagging injury in Madrid and Rome checked her progress, while a bout of food poisoning last week left her feeling a little under-prepared coming to Paris.
Given the circumstances, her win over Collins was a rock-solid start and good preparation for her second-round battle with another hard-hitter, Camila Giorgi of Italy.
“There's been a lot of obstacles, I feel like, the last couple of weeks specifically, that have been really tough physically and then taking their toll mentally because of that,” she said.