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.
Next up for Halep is another 19-year-old youngster, Iga Swiatek of Poland, whom Halep defeated in the round of 16 here last year.
Chaux, who was named in Colombia's preliminary squad for last year's Copa America in Brazil, joined America de Cali this year from their Colombian top flight rivals Patriotas Boyaca.
"We mainly worked on guarding their three-pointers, also doing well on 3-pointers and rebounds on our own," Dongguan coach Lin Yaosen commented.
On the Dongguan side, Shen Yi nailed 13 points, while Hu Ke added 10.
Rodrigo Ely's 74th minute header, following a free kick, gave Alaves its first win of the season at home to Athletic Club Bilbao, who again disappointed just three days after suffering a home defeat to Cadiz and has dropped to second from bottom in the table.
Earlier in the women's race, the world record holder Brigid Kosgei defended her title in 2:18:58.
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.
"The match today I think we both play really well and a really great match. She played unbelievably good," said Zhang, who defeated Burel 6-3, 7-6(3) in the Strasbourg Open before coming to Paris.
Osasuna got back to winning ways with a 2-0 win at home over Celta Vigo, thanks to a 23rd-minute goal from Facundo Roncaglia, who fired home from outside of the Celta penalty area, before crossing for Jonathan Calleri to head home the second for the Pamplona-based outfit 14 minutes from time.
Five Dongguan players scored in the double-digits. Dilana Dilishati had 19 points and eight boards. Shen Yi scored 18 points and dished out eight assists.