"I need to shoulder more responsibilities," said Guo, who joined Hebei during the offseason.
Gaston is to challenge third seed Dominic Thiem in the fourth round. Earlier in the day, the Austrian had claimed another straight-sets victory over 28th seed Casper Ruud, beating the Norwegian 6-4, 6-3, 6-1.
Thomas will be a big loss for Atletico, but the club were able to compensate partly for his loss with Uruguayan midfielder Lucas Torreira arriving on loan from Arsenal with an option to make the deal permanent at the end of the season for 20 million euros.
Elsewhere, Santos rallied late to secure a 3-2 win at Goais. Marcos Leonardo, Jefferson and Marinho were on target for the visitor while Vinicius Lopes and Victor Andrade scored for Goias.
Wang Lili made 11 of 20 field shots and scored 25 points for Xinjiang, one of the title contenders over the current campaign. Wang Siyu helped with 11.
The 12th seed poured out his intense emotions on the court, yelling at himself or his coaches after wasting several chances.
Fueled by Wei's six points in a row, Inner Mongolia widened the gap back to seven points, and they used a 22-13 second quarter to build a 13-point advantage at halftime.
Insufficient defense marked by only 29 rebounds compared to 53 by the visitor proved to be the key element that led to Handlova's second defeat and put it at the bottom of the rankings.
On the men's side, 12-time Roland Garros winner Rafael Nadal continued his run after dropping only four games to complete a 6-1, 6-1, 6-2 win over American youngster Sebastian Korda, son of 1998 Australian Open winner Petr Korda. Enditem
The following games are scheduled for Saturday: Borussia Dortmund host Freiburg, Eintracht Frankfurt face Hoffenheim, Cologne entertain Borussia Monchengladbach, Werder Bremen encounter newcomers Arminia Bielefeld, newly-promoted Stuttgart clash with Bayer Leverkusen and RB Leipzig play bottom side Schalke. Enditem
Her former teammate in Beijing, Shi Xiufeng, showed an eagerness to return to court.