"Despite only one week, she has improved a lot since we met last time. She is very young, but she has got everything on the court. Last time in Strasbourg, she didn't go into the game so quickly and played not so steadily. But this time, I can feel her confidence has boosted after winning two rounds at a Grand Slam," the former world No. 23 added.
Cadiz had lost their previous 13 league visits to Athletic Bilbao.
Also on Saturday, fifth-seeded Stefanos Tsitsipas earned a spot in the fourth round after his Slovenian opponent Aljaz Bedene retired from the match and hobbled off the court when trailed by 6-1, 6-2, 3-1.
Luis Enrique has handed a first call up to Levante midfielder, Jose Campana, while recalling Dani Caballos (Arsenal) and Sergio Canales (Betis) to a 25-man squad.
The win also improves the Serbian's season record to a stunning 34-1. The only defeat came in a disqualification earlier this month at the US Open, where he hit a ball in frustration which struck the line judge on the neck.
"I don't care about the result of the river-cross competition, I only want to feel the fighting spirit against waves," Zhu added. Enditem
After pocketing the second win consecutively since the beginning of the season, Shanxi coach Li Ge gave a high appraisal of some of his veterans' performance.
Henan coach Li Jianxin offered a score of 80 points for his team's performance.
"Schalke's squad is poorly composed. We are talking about the sins of the past," the 59-year-old said.
"Scoring goals gives us confidence. It is a great victory," said PSG head coach Thomas Tuchel.
Elsewhere, Athletic Club were linked with a late return of former striker Fernando Llorente only for the deal to fall through, while Valencia coach Javi Gracia is rumored to be considering resigning after a summer which saw the departure of players such as Dani Parejo, Ezequiel Garay and Rodrigo Moreno without any new arrivals to strengthen a squad which failed to qualify for Europe last season.