Both sides posed threats to the other, but no goals were scored in the first half. Shijiazhuang once got a good chance to score in the 33rd minute when forward Liu Xingyu was clean through on goal but his low volley was easily saved by the keeper.
Peters, 26, who is riding in his maiden Tour de France, produced a brilliant long-range solo breakaway to record his first stage win, leading Toms Skujins and Carlos Verona, who arrived at the same time, by 47 seconds.
Williams will take on Bulgaria's Tsvetana Pironkova, who overcame Alize Cornet of France 6-4, 6-7 (5), 6-3 in another round of 16 match.
Zall leveled three minutes later when Cote d'Ivoire striker Jean Evrard Kouassi netted a close-range header.
The captain scored his and Spain's second by looping a header over Andriy Pyatov just before the half-hour mark, only for Fati to steal his thunder with a wonderful strike just three minutes later.
"I was thinking to run maybe 1:04:50, but I'm so happy," said the 2016 world half marathon championships gold medalist.
"Serena is Serena," Sakkari said after advancing earlier on Saturday by beating 19-year-old American Amanda Anisimova 6-3, 6-1. "You have to come up with some great tennis. Otherwise there is no chance against her." Enditem
After successful completing the distance, his emotions turned to "delighted and surprised."
"Everybody dreams of wearing the yellow jersey one day in his life so first off I'm just happy how things are," Roglic said.
"I love football and I want to engage in football-related work," says Xie, who won Gansu's 4th Middle School Sports Meeting championship.
Chongqing surged into a 2-0 lead just 22 minutes into the game with a pair of strikes from Alan Kardec and Adrian Mierzejewski, while Teda's Hui Jiakang pulled one goal back in the 62nd minute.