As the match progressed, Joachim Low's men retreated with their narrow lead and kept all their men behind the ball.
The success of clubs and coaches strengthens the Bundesliga's position in European football, against the English Premier League, Spain's La Liga, the Italian Serie A, and France's Ligue 1.
"So you have to make her in trouble. That's what I like and it was a great challenge for me today. I did well in this challenge and I can take the happiness for it, and now I'm after another one."
Defender Mohammad Reza Khanzadeh, midfielders Ashkan Dejagah and Akbar Imani scored for Tractor in the first half.
In the 65th minute, Dalian's Ke Zhao added a goal of his own and sealed the 4-0 victory.
"Prize money and allowances have been equalled for men's and women's football, which means female players will earn the same as the men," Brazilian Football Confederation (CBF) president Rogerio Caboclo said in a virtual news conference.
There were also second round wins for fourth seed Stefanos Tsitsipas of Greece, fifth seed Alexander Zverev of Germany and seventh seed David Goffin of Belgium.
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
The 54-year-old Dane announced he has been receiving medical treatment for the condition after being diagnosed some years ago and, with the assistance of doctors, has continued to carry out his duties as BWF president "without limitation," said the world governing body.
Calling systemic racism one of the two "pandemics" afflicting the United States, Lurie said during his annual State of the Eagles address that change will not happen until "we realize we're responsible for it."
German football can be a role model in several ways, Klein said in a recent Xinhua interview.