Meanwhile, Iga Swiatek's Roland-Garros title defence could not have got off to a better start as the young Pole celebrated her 20th birthday with a 6-0, 7-5 defeat of Slovenian Kaja Juvan.
The No.8 seed, who received a birthday hug from her good friend Juvan before the clash began, extended her winning streak to seven matches in a row, having captured the Rome title earlier this month.
>> DAY 2 RESULTS
Swiatek, whose last match coming into the tournament was a 6-0, 6-0 win over Karolina Pliskova in the Rome final, delivered a third consecutive bagel to start her showdown with Juvan.
The contest became a real battle in the second set but it was Swiatek who had the upper hand, securing the victory in just under an hour and a half.
The two friends shared a warm embrace at the net and Juvan stuck around for a small birthday celebration on court for Swiatek.