Representing her hometown Zhejiang, Ye established an advantage from the very beginning in the final and edged runner-up Yu Yiting, also from Zhejiang, by about one second. Chen Xinyi from Shanghai took third place.
The remaining games will be played on Sunday, with FC Barcelona kicking off their season at home to Villarreal. Enditem
Registered runners will now have the choice to defer their registration into next year's event or receive a refund of their entry fee.
"I am really happy about my first round. I was facing another great champion today. The transition to clay and the cold conditions worked out pretty well," said Thiem.
Elsewhere, Guangzhou Evergrande sealed the 1-0 win by an own goal from Dalian Pro defender Shan Pengfei.
"I am very happy," Nadal said in French at the Court Philippe-Chatrier after the triumph, "It will be another difficult match against Travaglia or Nishikori. I hope to play a good level. It's always special to play here in Paris, especially here on Court Philippe-Chatrier, so I'm very happy to play another time."
Bayern started highly motivated in the encounter and took command while Hoffenheim kept 11 men behind the ball in the opening stages.
The match had been suspended by a Rio de Janeiro labor court on Saturday but the decision was overturned by a senior judge just 10 minutes before kickoff. The game eventually started more than 20 minutes late.
Sergio Ramos won the game for Madrid with an 82nd minute penalty awarded through VAR after Marc Bartra was judged to have handled a ball from Borja Mayoral, although nobody had appealed for the foul.
Earlier in the day Suarez scored twice and provided an assist on his Atletico Madrid debut, just four days after arriving from Barcelona as Atletico began their campaign with an impressive 6-1 victory at home to Granada.
The 22-year-old swimmer also broke the national record of the women's 100m freestyle in 52.90 seconds on Sunday. Enditem