Hoffenheim dominated possession and produced more promising chances but Horn was on guard to deny Kramaric and Pavel Kaderabek in the 18th minute.
Meanwhile, FIFA president Gianni Infantino restated FIFA's support for the football community during the crisis.
Dortmund broke the deadlock courtesy of two 17-year-old youngsters, as new arrival Jude Bellingham passed into the path of Giovanni Reyna, who drilled the ball right-footed into the far corner in the 35th minute.
Aubameyang, 31, joined the Gunners from Bundesliga side Borussia Dortmund in 2018 and has since made 111 appearances and scored 72 goals.
With the domestic 2020/2021 campaign set to start on this Friday evening, none of the 17 challengers seems to have found a convincing answer yet.
KPMG recently rated Schalke among the 15 most valuable clubs (814 million euros) worldwide.
The Royal Blues striker welcomed Germany's federal states' joint decision to allow the return of 20 percent of the fans in a test-phase until the end of October.
"But we don't want it only to be a marketing measure but hope we can add quality to our squad," Jobst told Xinhua. "We want any future player to be a regular in our first team."
The teenage footballers lost their lives late Saturday when the vehicle they were traveling in was involved in the collision in the country's southern Ashanti region.
"In view of the recent COVID-19 related developments around the world, a number of teams and individual players have elected not to travel to Denmark for tournaments in Aarhus and Odense, a choice the BWF has to respect and acknowledge," said the BWF. "It has been realized that we are not in a position to deliver the level of competition reasonably expected by fans and all stakeholders."
BRATISLAVA, Sept. 18 (Xinhua) -- The leader of Slovakia's Premier League Dunajska Streda Football Club advanced for the first time in the team's history to the third round of the Europa League Qualifiers after defeating Jablonec Football Club from the Czech Republic 5-3 in a goal-rich match-up on Thursday.