Gaston is to challenge third seed Dominic Thiem in the fourth round. Earlier in the day, the Austrian had claimed another straight-sets victory over 28th seed Casper Ruud, beating the Norwegian 6-4, 6-3, 6-1.
Yerry Mina's header put Everton back in front on the stroke of halftime and James rounded off an excellent individual display with two second half goals.
Cavani was left out of the Celeste squad by head coach Oscar Tabarez, paying the price for having not played since March.
"Faced with the uncertainty brought by the pandemic, Beijing 2022 will continue to keep close communication with the International Olympic Committee, International Paralympic Committee, International Federations and other stakeholders to push forward the preparations smoothly as always." Enditem
Mohamed Salah scored twice for Liverpool, but that was scant consolation as Liverpool became the first reigning champion to concede seven goals since 1953.
"I feel quite happy that we finally have games to play," said Inner Mongolia's center Li Yueru, who finished with 28 points and 14 rebounds in a 44-point rout of Hebei.
"We met some difficulties after our key players' departure," Dongguan coach Lin Yaosen admitted.
Liu Jiacen scored 22 points and pulled down 11 rebounds for Shanxi. Zhao Zhifang also registered a double-double of 12 points and 12 boards. Captain Wu Tongtong nailed 21 points.
"We did well on defense," said Inner Mongolia coach Zheng Wei, also assistant coach of China's national team, adding the team still needs to build its chemistry through more game time.
Dongguan started the last quarter with Shen bagging five straight points, followed by Zhang Dongxia's shot from the 3-pointer zone. Powered by Dilana and Shen, Dongguan built an eight-point lead with 1:39 on the clock, and their win was assured by Wang Zhen's three-pointer with 39 seconds remaining.
The two-time Grand Slam winner committed just seven unforced errors throughout the one-sided encounter and broke her opponent's serve six times.