Lautaro Martinez came off the bench to add the fifth for Inter with a rocket in the 72nd minute, and Caprari scored a consolation goal for Benevento four minutes later.
The 39-year-old tennis great, who is seeking a record-equaling 24th Grand Slam title, skipped all the tune-up tournaments for the clay major and practised at the Mouratoglou Academy, but acknowledged she was "not one hundred percent" as the French Open started.
Ronald Koeman saw his reign as Barca coach get off to a flying start on Sunday when Ansu Fati led them to an easy 4-0 win at home to Villarreal, with all four goals coming before the break.
Local favourite Kristina Mladenovic was a victim of a missed call in her first round defeat to Laura Siegemund of Germany on Tuesday.
Beijing's Qi Yu stepped up by contributing a game-high 19 points, including seven in the opening period.
PARIS, Sept. 30 (Xinhua) -- No. 6 seed Serena Williams was forced to pull out of the French Open ahead of her second-round match against Bulgarian Tsvetana Pironkova on Wednesday because of an Achilles injury.
Meanwhile, Guarani also booked a place in the next stage of the tournament with a 3-1 win at Tigre. Johan Romana, Jose Florentin and Cecilio Dominguez netted for the Paraguayan outfit while Pablo Magnin was on target for the Argentine side.
Elsewhere, Guangzhou Evergrande sealed the 1-0 win by an own goal from Dalian Pro defender Shan Pengfei.
In women's singles actions, 23-time Grand Slam champion Serena Williams survived a topsy-turvy opening set to ultimately ease past fellow American Kristie Ahn, 7-6(2), 6-0 to advance. Enditem
Icardi found the target in each half thanks to two assists from French international Kylian Mbappe.
The Latvian had been knocked out at the first round in 2018 and 2019. She will play Spain's Paula Badosa in the third round.