"We had a good start in each set, but in the second set, when one of the opponents left the court with an injury, I felt our players relaxed a bit mentally. Then I asked for a time out to prevent our team from losing ground. There is no doubt that we played well in the last two sets," said Tianjin head coach Wang Baoquan.
In the other action on Friday, women's third seed Elina Svitolina cruised past 27th-seeded Ekaterina Alexandrova 6-4, 7-5 to advance to the next round. Argentine qualifier Nadia Podoroska extended her stunning run on clay after the restart of the season, as the 23-year-old dispatched Anna Karolina Schmiedlova 6-3, 6-2 to become the first Argentinean women's player to reach the fourth round in Paris since 2011. Enditem
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.
Peng Szu-Chin led Shanghai's charge with 25 points. Li Yingyun and Zhang Zhiting contributed 24 and 21 respectively. Zhang also grabbed 11 rebounds.
Next for Zhang is the winner between Czech No.7 seed Petra Kvitova and Canadian teenager Leylah Fernandez. Enditem
The 33-year-old will play 17th seed Pablo Carreno Busta the round of eight. The Spaniard dispatched German qualifier Daniel Altmaier 6-2, 7-5, 6-2.
The last set became a lop-sided affair for Tianjin, which went on a 12-4 run to pull away and kept the advantage until the end.
Khachanov won the pair's previous encounter in Paris - at 2018 Paris Masters, when the Russian claimed a straight-set win in the final to clinch the biggest title of his career until now.
Shaanxi trailed for most of the game, but outscored Wuhan 23-18 in the last quarter to grab the morale-boosting win.
"I'm very happy. It was a great match, I didn't make any mistakes. Casper is a really great player, very attractive to play, I think there were many good rallies, it was a good match from both of us," said the recently-crowned US Open champion.
He also suggested that people should go to qualified institutions and participate in these sports with professional guiding and safety measures. Enditem