Mendilibar lost several key players, such as Fabio Orellana, Charles and Escalante over the summer, while Ivan Ramis retired, and so far adequate replacements haven't arrived leaving the squad weaker than the one which struggled last season.
New arrival Nayef Aguerd's goal after 33 minutes put Rennes in front. Serhou Guirassy scored a brilliant volley set up by winger Romain Del Castillo in the 52nd minute to extend Rennes' lead, before Adrien Hunou added the third in the closing period with a superb lob.
With Ji Xiang's smart side volley and Zhang Boyu's header successively missed target in Shenzhen's offense, Suning led off a more fierce attack. In the 28th minute, Teixeira made full use of Li Ang's penalty and helped Suning take a 1-0 lead.
"[I'm] struggling to walk so that's a tell-tale sign that I should try to recover," she added.
Vinicius Paiva put the hosts ahead by tapping home just after halftime before Lucas Evangelista equalized with a long-range effort.
Villarreal travels after an easy 3-1 win at home to Alaves and with strikers Paco Alcacer and Gerard Moreno both in excellent form after netting six goals between them in Villarreal's first four games of the season.
Also on Tuesday, men's singles seventh seed Matteo Berrettini of Italy cruised to a 6-3, 6-1, 6-3 victory over Canadian Vasek Pospisil.
The significance of completing the whole first stage with no one from the closed living and training zone testing positive for the coronavirus cannot be understated. It should be noted that the Dailian Division even faced the threat of a local epidemic outbreak.
Airgoal is paying more attention to the domestic market, given the fact that China has been promoting school sports in recent years.
"At the beginning, it's never easy, especially at the beginning of a new tournament. It's the first time for me here at Roland-Garros," the 19-year-old said.
Dalian had the chance to score the equalizer but Salomon Rondon's free-kick smacked the woodwork.