In just the third minute of the first half, 17-year-old Fati drew a foul from Serhiy Kyrvstov to earn a penalty that Sergio Ramos converted clinically.
The teams are due to meet at Estadio Azteca in Mexico City on September 30, however health concerns and possible quarantine measures have cast doubt over the fixture.
Williams said: "It was intense I have to say. We always have some really incredible matches and it brings out the best of my fitness when I play Sloane. I tried to stay calm and be more serene after the loss of the first set. I knew it was important for me just to keep trying, just to keep going."
In the final and decisive women's doubles, Feng XueYing/Wu Yingshi swept Lv Rouhao/Ren Linfei to award Shenzhen the victory.
Williams defeated Russia's Margarita Gasparyan 6-2, 6-4 while Kenin needed an hour and 22 minutes to maneuver past Canadian youngster Leylah Fernandez 6-4, 6-3.
Ruichang defeated Hunan Hualai 4-1 to continue sitting second, leaving their opponents in third place.
"Catalyzing, accelerating developments shared in amongst the citizens of a given city region or country. The Games represent a formidable asset to accelerate some long term developments. This is what has been done for Beijing 2022, and we've learned a lot." Enditem
In the second half, Shanghai launched aggressive attack to pull one back, but their efforts turned out to be fruitless.
Jepchirchir's winning mark beats the previous record of 1:06:11 set by Netsanet Gudeta of Ethiopia at the World Half Marathon Championships in 2018.
Kenin has won her last 10 major main draw matches after hoisting her first Grand Slam title at this year's Australian Open, but the Belgian proved too strong for her, advancing after just 74 minutes.
"This whole situation has left me really sad and empty. I checked on the lines person and the tournament told me that thank God she is feeling ok. I'm extremely sorry to have caused her such stress. So unintended. So wrong," Djokovic said.