According to Luo, sporting goods companies, including sports giants Nike and Adidas, were facing big pressure in sales.
The Serb frequently used drop shots throughout the game, just as he did during his Rome title run last week.
Pironkova, 33, who has just returned to the Tour after three years' absence at the US Open and made an impressive run to the quarterfinals, receiving a walkover to the third round in Paris. Enditem
Three other Iranian teams Sepahan, Shahr Khodro and Esteghlal have already been eliminated from the competition held in Doha. Enditem
The Italian rising star ripped 11 games in a row to defeat the Belgian for the second time in as many head-to-head meetings.
Vasco are now fifth in the standings with 18 points while Brangatino are 17th, seven points further back.
"We are exhausted," the 32-year-old Pole said after the Bavarian lost 4-1 in Hoffenheim.
Though both drivers were unhurt, the time needed to repair the extensive damage to the barriers meant that the race was not restarted, with the results being taken from the end of lap 5 and only half championship points being awarded.
"Mistakes are human, but I don't see how the umpire can miss that. She didn't see a double bounce," the 2017 French Open quarterfinalist added.
"It's our 10th straight year at the Sport Show," said Airgoal's Liang Jiahua. "We are bringing some new products here and the sales are satisfactory."
If Villarreal coach Unai Emery was unhappy at the space his side left Barca in the opening goal, he will have been furious as Fati doubled his tally just four minutes later.