Bruno Nazario equalized shortly after with a dipping free-kick that rebounded in off the crossbar after a clumsy attempt to parry the ball clear by goalkeeper Cassio.
Gu also says that exercising makes him feel young and healthy.
However, seven of the players tested positive for COVID-19 a few days after their arrival in camp.
Spain responded with a big chance at the other end of the pitch as a misplaced return pass from Emre Can to goalkeeper Kevin Trapp allowed Rodrigo Moreno to intercept the loose ball. However, Trapp denied Moreno after blocking the shot in the nick of time in the 14th minute.
The result at Morumbi stadium marked Sao Paulo's fourth victory in five matches and lifted the Tricolor to second, a point behind Internacional.
"This is crazy. It was already something unbelievable to win a stage on my first participation to the Giro d'Italia last year and now it's the same at the Tour de France," said the AG2R rider after the victory.
"The IOC continues to be impressed by the progress of the preparations. And we are all looking forward to writing this new chapter in China's great sporting history." Enditem
But things didn't go as organisers may have expected.
The last minutes of the first half witnessed the prowess of Saba. The Israeli striker added an open goal in the 39th minute, then delivered a precise cross for Ye Chugui six minutes later, helping the Guangzhou side lead 3-1.
This year, world number four Kenin counts herself among the top players, but the challenge won't get any easier as Tunisia's Ons Jabeur, one of the most in-form players of 2020, awaits in the next round.
With the result, Spain and Germany share the spoils and second place in Group 4. The Spaniards clash with frontrunners Ukraine while Switzerland face Germany on Sunday. Enditem