Alison Riske threatened a French Open upset on Wednesday but Simona Halep turned her fortunes around to book her place in round two.
A first grand slam appearance since January 2017 for Serena Williams ended in victory over Kristyna Pliskova in the French Open first round.
Simona Halep is pleased the likes of Serena Williams, Victoria Azarenka and Maria Sharapova are competing at this year's French Open.
Predicting this year's French Open winner is no easy task, says three-time Roland Garros victor Monica Seles.
World number one Simona Halep appeared hampered by injury in Rome, but she insists there is no lasting issue ahead of the French Open.
An off-colour and potentially injured Simona Halep had no answer to Elina Svitolina in the Internazionali d'Italia final.
Both Simona Halep and Maria Sharapova struggled to serve with any consistency in Rome on Saturday, but the world number one triumphed.
Simona Halep will play Maria Sharapova in the semi-finals of the Internazionali d'Italia after contrasting victories in Rome.
While Simona Halep enjoyed a walkover, Caroline Wozniacki needed three sets to defeat Anastasija Sevastova and reach the last eight.
Madison Keys' rib injury saw her pull out of the Internazionali d'Italia and Simona Halep keep her spot atop the WTA rankings.