Viera bagged his second with a stunning free kick in the 56th minute, before Cedric Bakambu added the fifth in the 85th minute.
Bosnia and Herzegovina's Dejan Mileusnic, the 2016 Balkan champion, finished third with 79.57m. Enditem
The club insisted that their measures and protocols around COVID-19 remain stringent. They even offered to test the Hull City team ahead of Tuesday's fixture, but the visitors declined the offer.
In Sunday's game, Pirlo started new arrivals Dejan Kulusevski and Weston McKennie, with talisman Cristiano Ronaldo leading the attacking line.
"These are strange moments, and it is difficult to accept, but you have to accept it," he insisted.
Dalian pulled one back four minutes later when Salomon Rondon tucked an unchallenged shot into net. The hosts pushed hard for an equalizer in the second half, but none came, and Gao Lin headed home from a free-kick to add a third for Shenzhen in the 74th minute. Enditem
After the goal, the Spanish team gained momentum and put pressure on Bayern, but the German side equalized in the 34th minute through Leon Goretzka's finish.
Djokovic, the world number one and the top seed at the tournament, won 7-5, 6-3 against Argentine Schwartzman to lift his 36th Masters title, one more than Rafael Nadal.
Guoan now sits second in Group B with 25 points, with two rounds in the first stage remaining, and has booked a spot in Group C for the championship race.
The teams had been due to meet at Estadio Azteca in Mexico City on September 30, but Costa Rican federation Fedefutbol said it had no choice but to withdraw from the match because of quarantine rules.
Wuhan ranked fifth with 16 points, only one point behind the fourth-placed Shijiangzhuang Ever Bright and two points behind the third-placed Hebei China fortune, while Chongqing sat sixth with 15 points before the match.