Fiorentina loanee Pedro put the visitors ahead in just the second minute by pouncing on an errant pass and sliding home from close range.
The result lifted Flamengo to fifth in the 20-team standings, five points behind leaders Internacional
Klein is expecting the many young talents to continue their performance. He mentioned Dortmund's Erling Haaland as one of the examples next to Jadon Sancho.
Nouri suffered brain damage after having a heart attack during a game in 2017.
The 28-year-old is now 16th in the overall rankings, 16 seconds behind new leader Yates.
To coach in Germany's top three leagues, one must obtain a football coaching licence, and the country has a strict and selective education system, he explained: "Each year, only 24 or 25 applicants are accepted at the only education venue, the Hennes-Weisweiler Academy in Cologne."
With the result, Spain and Germany share the spoils and second place in Group 4. The Spaniards clash with frontrunners Ukraine while Switzerland face Germany on Sunday. Enditem
Iran sit third, behind Iraq and Bahrain, in Group C of the 2022 FIFA World Cup Asian Zone qualification. Enditem
At Rio de Janeiro's Olympic stadium, former Chelsea forward Salomon Kalou made his debut for Botafogo but could not inspire the hosts to victory over Coritiba.
Earlier, sixth seed Petra Kvitova of the Czech Republic edged past Ukraine's Kateryna Kozlova 7-6 (3), 6-2, and eighth seed Petra Martic of Croatia beat fellow Ukrainian Kateryna Bondarenko 6-3, 6-4 to also advance into third round. Enditem
"I was looking to take the jersey on stage six anyway so I'll go in with the same tactic - try to win the stage and see what happens."