The ITTF revealed that Zhu has pulled out of the Women's World Cup due to health issues. Sun is also scheduled to play at the 2020 ITTF Finals.
"We found several problems during the tournament and we will strengthen training in the future," he added.
The ITTF said that it is in discussions with local organizers of the 2020 ITTF Finals about the possibility of having spectators at the event.
Clinching a victory in his 100th match at Roland Garros, the record 12-time champion secured a place in the last four for 13th time in the clay major, ending an impressive run from Sinner who had upset 11th seed David Goffin and 6th seed Alexander Zverev in his previous matches.
His initial spell at the helm ended after the 1990 World Cup, however, Tabarez returned in 2006 and immediately turned the team's fortunes around.
"We played great in the first half, but after bench players came in, they suffered a bit and failed to maintain the level on both ends," said Jiangsu coach Ding Tie.
In other games in Chengdu, after a goalless first half, Beijing Renhe broke the deadlock in the 57th minute to claim a 2-0 victory over Suzhou Dongwu. Taizhou Yuanda defeated Inner Mongolia Zhongyou 2-0.
There will be tension in Vitoria as Alaves looks to improve on a poor start that has brought just one point in four games under new coach Pablo Machin. They entertain Athletic Bilbao, who produced a dreadful display to lose 1-0 to a newly-promoted Cadiz side that played with nine men for almost 30 minutes on Thursday.
Moments later, new arrival Joel Pohjanpalo scored his first goal for Union only 35 seconds after coming on to put the result beyond doubt in the 64th minute.
As expected, there was no place for striker Edinson Cavani, who has yet to find a new club after leaving Paris Saint-Germain in June. The 33-year-old has not played since March.
Kvitova went into the match quickly as she broke her Chinese opponent twice to surge to a 4-0 lead in the opening set, before serving for the set in the eighth game.