Speaking to Sky Sports while on international duty with Wales, Bale was asked about his future at the La Liga champions.
Fiorentina loanee Pedro put the visitors ahead in just the second minute by pouncing on an errant pass and sliding home from close range.
"Kyle played a fantastic first set," added Djokovic. "He didn't do much wrong, he served very well and was aggressive from the back of the court. Usually his forehand is a weapon, but his backhand, especially in the first set, was very strong, very solid."
"This victory is very important to me - I've worked so hard to get this win," said the 27-year-old Kazakh.
"This is my duty to know my team's weaknesses since I don't want to waste my time," the Croat added.
In the 65th minute, Dalian's Ke Zhao added a goal of his own and sealed the 4-0 victory.
In other matches on Wednesday, Ceara beat local rivals Fortaleza 1-0, Atletico Goianiense drew 1-1 at Fluminense, Corinthians won 2-1 at Goias and Bragantino drew 1-1 at Athletico Paranaense. Enditem
"It was anybody's game really for a set and a half. I made some breaks and then obviously after winning the second set I felt more comfortable. I was returning better, I started to read his serve better, and I was pleased with my serve. Overall, it was a very good test, and I am happy to get through," said Djokovic, who is bidding to capture his fourth US Open trophy and 18th Grand Slam title.
German football can be a role model in several ways, Klein said in a recent Xinhua interview.
Other clubs are expected to follow.
Fourth seed Naomi Osaka of Japan booked her place in the third round with a comfortable 6-1, 6-2 win over Italy's Camila Giorgi.