The race continued in a fairly processional manner until lap 20, when Kevin Magnussen's Haas stopped just before the pit entrance, bringing out the safety car and bunching the pack up.
France's Julian Alaphilippe, who lost the yellow jersey to Yates on Wednesday after being penalized for 20 seconds for taking a bottle inside the final 20km, sprinted late to finish one second ahead of the peloton.
Kim Min-Jae (L) of Beijing Guoan vies during the 9th round match between Wuhan Zall and Beijing Guoan at the postponed 2020 season Chinese Football Association Super League (CSL) Suzhou Division in Suzhou, east China's Jiangsu Province, Sept. 6, 2020. (Xinhua/Li Bo)
Djokovic immediately rushed over to check if she was okay and placed his hand on her back as she struggled for air. After a few minutes she was able to get up and walk off the court.
Chen Siyan (70) and Yin Xiaowen (71) were the top amateurs at three-under par, tied for equal sixth with Miranda Wang Xinying (69) at seven strokes back.
The 28-year-old was close to scoring a hat-trick in the 60th minute, only to see his one-on-one shot blocked by Jianye's goalkeeper Wu Yan.
Leon are now a point clear of second-placed Cruz Azul, who will have the chance to regain top spot when they visit Atlas on Saturday.
Zall leveled three minutes later when Cote d'Ivoire striker Jean Evrard Kouassi netted a close-range header.
The remainder of the match was controversial after Gao Lin was shown his fourth yellow card of the season in the 71st minute after complaining to the referee. The Chinese international is set to miss Shenzhen's next match against his former club Guangzhou Evergrande next Wednesday.
GUANGZHOU, China, Sept. 9 (Xinhua) -- Four top football academies in China, Guangzhou Evergrande, Guangzhou R&F, Shandong Luneng and Zhejiang Greentown, jointly issued an open letter on Tuesday, condemning some "immoral" agents.
FIFA added that a new schedule would be unveiled "in due course" after further talks with CONCACAF officials, confirming only that the first round would be in March.