Dortmund had three times as many shots on goal and dominated with 80 percent possession, which left their Swiss coach Lucian Favre to admit, "we are very disappointed, it's hard to accept this defeat".
Bundesliga: Japan's Daichi Kamada shines as Eintracht Frankfurt down Hertha Berlin 3-1 for season's first win
Kamada, who has four international appearances, set up efforts for Bas Dost and Sebastien Rode after Andre Silva had opened the scoring in the German capital.
Bundesliga: Schalke 04, Borussia Monchengladbach report positive COVID-19 case ahead of weekend fixtures
While Schalke 04 didn’t identify the player who tested positive for COVID-19, Monchengladbach confirmed defender Jordan Beyer has the virus.
Bayern drew particular criticism in the German media after club officials including chairman Karl-Heinz Rummenigge, president Herbert Hainer and board member Oliver Kahn sat together in the VIP stand.
UEFA Awards: Bayern Munich, Lyon stars dominate men's, women's POTY nominations after Champions League wins
The winners will be announced on 1 October, when UEFA hold the draw for this season's Champions League group stage at their headquarters in Nyon, Switzerland.
UEFA Super Cup: Several Bayern Munich fans return tickets over COVID-19 fears after spike in cases in Hungary
Budapest will host the match between Champions League winners Bayern Munich and Europa League holders Sevilla, however, the fixture is facing growing criticism.
Bundesliga: Erling Haaland double inspires Borussia Dortmund to win over Monchengladbach; Hertha Berlin thump Werder Bremen
Coach Lucien Favre banked on youth by starting two 17-year-olds in Reyna and England Under-21 midfielder Jude Bellingham, who made his league debut, with Sancho and Haaland, both 20, leading Dortmund's attack.
The 29-year-old becomes Liverpool's first major signing for two years, in which time they have won the Champions League and a first English league title for 30 years.
Bundesliga: Serge Gnabry hits hat-trick, Leroy Sane scores on debut as Bayern Munich demolish Schalke in season-opener
Just 26 days after winning the Champions League final, Bayern picked up where they left off last season with their 22nd-straight win.
Thiago agreed a "long-term contract" with the Premier League champions after deciding to end his seven-year stay with Bayern.
Bundesliga: Bayern Munich to kick off new season behind closed doors after spike in Munich COVID-19 cases
The decision puts an end to Bayern's plans to allow 7,500 fans into the Allianz Arena to watch Friday's opening game at home to Schalke.
Bundesliga: Bayern Munich's Kingsley Coman in isolation at home after contact with coronavirus-positive person
Bayern didn't say how long the France winger would need to spend in quarantine, or whether he's available to play Schalke on Friday in the German champion's first league game of the new season.
Germany's politicians are allowing each stadium to be at 20 percent capacity for the Bundesliga's 18 clubs, providing the seven-day rate of infection of the coronavirus is lower or equal to 35 per 100,000 inhabitants in the local region.
In the biggest attendance so far for a football team in Germany during the coronavirus pandemic, Union Berlin welcomed 4,500 fans for their 2-1 win over Nuremberg on Saturday.
The 36 clubs in the top two German football leagues voted on Thursday to continue the rule for next season. The decision comes after the Premier League moved back to three substitutions after using five to finish the 2019-20 campaign amid the pandemic.
Volland will link up with Monaco's new German-born head coach Niko Kovac, the former Croatian international who was sacked by Bayern Munich last November, but earned his first Ligue 1 victory on Sunday with a 1-0 win over Metz.
The last time Leipzig did not play behind closed doors was during a 3-0 win over Tottenham in the Champions League last 16 in mid-March.
Bundesliga: Peter Bosz says he 'doesn't expect' Kai Havertz, Kevin Volland to train with Bayer Leverkusen again
Havertz, a 21-year-old attacking midfielder who made his international debut two years ago, is one of the most exciting young talents in the German game.
Football means something to the players whether fans are there or not. That has always been true, of course. To some extent, it is perhaps not especially revelatory. But only now, in these weeks of quiet and still in the stadiums, has it been brought into sharp focus.
‘Playing without fans is a disaster’: Borussia Dortmund's Sebastian Kehl on football during coronavirus
For clubs like Borussia Dortmund, which rely as heavily on the money from gate receipts as the noise from over 81,000 partisan fans screaming themselves hoarse during each home game, this new normal has been nothing short of disastrous