"I used to like the international games as it was something different and I will keep working to get back," commented the forward, who said he had a "very good" relationship with Spain national team coach Luis Enrique.
Both players had also tested positive on Sunday, along with defender Christian Ramos and striker Aldair Rodriguez. The latter two were cleared to play in Tuesday's fixture at Estadio Nacional after testing negative on Monday, the Peruvian Football Federation said.
"I wanted to play this match as if it was the first round. I didn't want to think it was a semifinal because it would have stressed me out."
The 2021 Gold Cup - the CONCACAF region's premier international competition - will be played from July 10 to August 1.
Zhou Shuang, the chief referee of the beach football, said that the soft sand requires more stamina and frequent substitution of players, which, however, reduces the injuries instead when players fall. "More players are able to jump with a beautiful overhead scissors shot or a volley, and that's what we hope to see," said Zhou.
"The players are finding their rhythm on the field, but they have yet to hit their best form to ensure a victory over South Korea next February," he said. "They need to further improve their techniques, coordination and tactics."
"Since preparations started in January this year, under the guidance of the Asian Football Confederation (AFC), we have achieved great progress despite the COVID-19 pandemic, as the design schemes of nine stadiums have been confirmed by AFC," said committee chairman Du Zhaocai.
Xu, Liang and Zhang Manman got Jiangsu off to a quick start and combined for 21 first-quarter points, but Xinjiang withstood the trio's attack to tie the scores at 21-21 thanks to Wang Lili's 10 points.
Ji is going through her fourth season in a duel role from the 2017-18 season.
The Saturday meet will be aided by Wavelight electronic pace-setter, a new technology in track running and the 24-year-old Kipyegon has expressed her confidence ahead of the meeting organized by Global Sports Communication for a selected group of world class athletes.
After substitutes stepped in, Xinjiang maintained its level of defense, holding Shanghai to shot-clock violations on several occasions and leading 27-18 at halftime.