Giustino beat Moutet 0-6, 7-6(7), 7-6(3), 2-6, 18-16 as the deciding set alone lasted three hours.
Brazil's Gremio also secured their place in the tournament's next phase on Tuesday, with a 2-0 home win over Chilean side Universidad Catolica. Pepe and Antonio Rodrigues were on the scoresheet for the Porto Alegre outfit.
But former Changchun Yatai striker Marinho equalized on the stroke of half-time and Kaio Jorge then bundled home from close range to guarantee Santos their fourth win from five matches.
The clubs are hoping for similar rules set up for the German national team ahead of internationals in October, including a game in Kiev.
After the result, Wuhan Zall ranks fifth with 17 points, while Tianjin remains the last without a single win in the Suzhou division. Enditem
Russia's Daniil Medvedev, seeded fourth, was unable to clinch his first win at Roland Garros after being shocked by Hungarian Marton Fucsovics 6-4, 7-6(3), 2-6, 6-1. It was the fourth successive first-round-exit for the 2019 US Open finalist at the French Open.
After a devastating 18-game winless run, Manuel Baum has been appointed the Royal Blues new head coach with former Schalke performer Naldo as assistant coach. Both signed a contract until June 30, 2022.
Zhejiang bagged all three medals in the men's 100m butterfly, as Hong Jinquan clinched the gold in 53.03 seconds.
Portu opened the scoring in the 55th minute from a tight angle after a pass from Mikel Merino, and Adnan Januzaj doubled the visitors' lead 13 minutes from time from the penalty spot after he had been clipped in the Elche area.
Ye is also the Asian record holder of the women's 200m individual medley in 2:07.57.
As the Asia and Oceania Cups were unable to be staged due to COVID-19, prominent names such as Zhu Yuling (China), Kasumi Ishikawa (Japan), Cheng I-Ching (Chinese Taipei) and Feng Tianwei (Singapore) have been selected according to their world rankings.