FC Barcelona coach Ronald Koeman was left frustrated as the club failed to complete deals to bring central defender Alex Garcia and forward Memphis Depay to the club from Manchester City and Olympique Lyon respectively.
It was short-lived joy for Berlin though, as Bayern took the lead again through Lewandowski, who tapped home his hat rick following Muller's assist inside the box in the 85th minute.
"I'm very, very happy to be in the semifinals again and here at Roland Garros," Nadal said on court. "No doubt that this is the most important place for me and the most beautiful place to play."
Also missing will be injured left-back Nilson Loyola and influential winger Edison Flores, whose club DC United refused to release him because of a mandatory 14-day self-quarantine for those returning to the United States capital from abroad. In addition, forward Jefferson Farfan is in doubt for the matches after re-injuring his troublesome left knee.
Elsewhere, Sassuolo registered another comprehensive victory as it beat Crotone 4-1 with Francesco Caputo's brace.
Luneng has been coached by Li since December 2017. He started working in Luneng's coaching team in December 2015 after he served as the head coach of the women's national team, coach of Qingdao Jonoon, and general manager of Shijiazhuang Ever Bright.
"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.
"In terms of where we are competition-wise, the objective at the end of the day is to measure our standard to the South African standard and see if we can meet it. We are not oblivious though, we have included six of our foreign-based players. They will bring in more drive and experience to add to that of our local players," he concluded.
Djokovic grabbed five of his 14 break points to claim the victory in two hours and 23 minutes, while his Russian rival only took advantage of two of his nine opportunities.
In women's actions, top seed Simona Halep took sweet revenge on her opponent from last year's French Open defeat, trouncing American teenager Amanda Anisimova 6-0, 6-1 to progress.
The 26-year-old Kenyan was far behind her world record of 2:14:04 that she set in Chicago last year, but met no challenge after 30 kilometers.