Two-time Grand Slam winner Kvitova had to bounce back from 1-5 down in the opening set against Canada's teenager Leylah Fernandez to set round-of-16 clash with Zhang.
"We didn't deal well with some details in the first half and conceded many errors," added the Chinese international.
Moussa Djenepo scored his first home goal for Southampton in the 41st minute and Oriol Romeu smacked home a sensational volley with just over 20 minutes remaining as the Saints kept their second clean sheet in two games.
"They are a strong team. Our young players seemed to be a bit afraid of that in the first half, while making some adjustments after the break," Tianjin coach Liu Hao commented, also hoping that his side can progress and improve after the loss. Enditem
Dominic Calvert-Lewin's 16th minute header put Everton ahead only for Jordan Pickford's error to gift Neal Maupay a 41st minute equalizer.
Although Saint-Maximin limped off with 18 minutes to go Wilson then scored a penalty to make it 3-1 and ensure Burnley are still looking for their first point of the season. Enditem
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.
"But I take it as a very positive thing. I am playing quite well to win against a player like Stefano today with this score.
Namibia Football Association (NFA) spokesperson Dan Kamati said that although their counterparts named a strong team, he chose to rather focus on what his team can offer and is confident that they will compete.
"She played really really well today. I think everything is tough. My ball is very short and she opened the court very nice and used very nice winners," said the world 39th-ranked Zhang, who has also achieved a personal best at Roland Garros by reaching the fourth round.
Paranaense reduced the deficit courtesy of a Renato Kayzer header but Everton Ribeiro put the result beyond doubt when he lashed home from 20 yards after combining with Giorgian de Arrascaeta.