The 2016 champion dropped just four games to record a 6-2 6-2 victory in an hour and nine minutes.
The pair traded breaks at the start of the match, but Stephens found her rhythm and reeled off seven games in a row between the first and second set.

Sloane Stephens of United States serves during the match between Sloane Stephens of United States and Pauline Parmentier of France as part of the day 2 of the Telcel Mexican Open 2019 at Mextenis Stadium on February 26, 2019 in Acapulco, Mexico

Image credit: Getty Images

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Joining her in the second round in Acapulco is former world number one Victoria Azarenka, who felled second seed Danielle Collins.
Currently ranked 50th in the world, Azarenka dominated her American opponent from the off, breaking twice in a row to take a 4-0 lead.
Collins had three chances to get ahead in the opening game of the second set, but the Belarusian kept her cool before going on to seal a 6-1 6-2 win.

Belarus' Victoria Azarenka at practice match against Ukraine's Elina Svitolina

Image credit: Reuters

Britain’s Johanna Konta had no trouble getting past doubles partner Laura Siegemund, taking a 6-3 6-2 victory to set up a meeting with Russia’s Varvara Flink.
Flink was just 30 minutes into her match against Amanda Anisimova when the American retired at 4-3 up in the first set.
Rebecca Peterson also retired at 4-3 down against Sofia Kenin, handing the American a second-round meeting with Britain’s Katie Boulter.
Meanwhile, Canada’s Bianca Andreescu prevailed 6-1 6-3 over Jil Teichmann, number four seed Mihaela Buzarnescu dismissed Australia’s Daria Gavrilova 6-4 6-2 and Saisai Zheng battled from a set down to beat Renata Zarazua 3-6 7-5 6-4.
There were also wins for Tatjana Maria, 6-2 7-6 (1) over Martina Trevisan, Timea Babos, who overcame Dalila Jakupovic 5-7 6-4 6-4 and Christina McHale, who saw off Ysaline Bonaventure 6-3 1-6 6-2.
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