"He was unable to train because of pain in his lower back," Lasmar told a virtual news conference. "He's shown a small improvement today, but it is important to consider that less than 24 hours have passed [since the injury]. He's traveled by bus and plane to be here, which has made treatment difficult.
Selby, having won the European Masters last month, is one step closer to defend his English Open title and will meet another Chinese player Chang Bingyu in the last 64.
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.
Zapata's Atalanta teammate Luis Muriel then coolly slotted home from 10 yards after Johan Mojica found him unmarked in the box.
Mikel Oyarzabal's 13th minute goal gave the Spaniards the win that means they have seven points from their opening three matches in the competition after previously drawing in Germany and beating the Ukraine (who they play again on Tuesday).
The record Roland Garros winner grabbed it, firing an ace to end the two-hour-and-41-minute final with a love game. He then kneeled down, smiled widely and pumped his arms. It was the fourth time he has won his favourite tournament without conceding a set.
Botafogo were reduced to 10 men just after halftime when Rafael Forster was shown a second yellow card for a rash challenge on Leandro Barcia.
Also on Sunday, defending champions Kristina Mladenovic of France and her Hungarian partner Timea Babos claimed the women's doubles title with a 6-4, 7-5 win over Chile's Alexa Guarachi and American Desirae Krawczyk. Enditem
Jia's team went through an unexpected quarantine amid the COVID-19 concerns during the Olympic qualifiers last February before entering the playoff.
Ghana captain Andrew Ayew and Samuel Owusu were on target in the 63rd and the 65th minute to restore Black Stars' lead.
The team is preparing for the Olympic Winter Games in Beijing, China. The plan of the preparation contained the training camp in Inzell, Germany. However, the Polish speed skaters returned to Poland prematurely after the seven members of the team tested positive for COVID-19.