Garbine Muguruza, seeded ninth, eased into the final eight. The Spaniard beat Johanna Konta of Great Britain 6-4, 6-1. Enditem
Liu also promised to organize WTT events across the globe, and strive to tap a huge potential market while remaining committed to hosting WTT events in all continents.
The 35-year-old agreed to a contract that runs until the end of the current Serie A season in February, Sport said on Thursday.
The 79,000-seat Maracana, which hosted the World Cup deciders in 1950 and 2014, was this month described as having the worst playing surface in Brazil by Flamengo vice-president Marcos Braz.
"I always try to push him to do things he didn't know he can do. His potential is huge," the Pole said and spoke about sprint duels he has started in training in order to challenge the 25-year-old German international.
Rain grew heavier at night, causing trouble for every athlete, but Asian record holder Xie still showed his dominance in the men's 200m. The 27-year-old took the lead all the way, rushing to the finish line in 20.72 seconds.
The Blacks and Yellows have put together a squad with exceptionally talented youngsters and seem the only serious challenger.
"I believe in Arsenal. We can achieve big things together. We have something exciting here and I believe the best is yet to come," he added.
Earlier in the day, women's 200m saw Kong Lingwei win with 23.64s as top favorite Ge failed to finish the race.
Brazilian forward Alan Kardec was awarded a special jersey to commemorate his 100th CSL appearance in Chongqing before the match.
Club officials said the number of fans must be manageable.