Club-record signing Riyad Mahrez made his first appearance in Chicago, where Mario Gotze's penalty lifted Borussia Dortmund on Friday.
Hans-Joachim Watzke has backed Mario Gotze to overcome his recent health issues and become a key figure for the Bundesliga side again.
Borussia Dortmund do not expect Mario Gotze to feature for the first team again until the start of the 2017-18 Bundesliga campaign.
Mario Gotze was recently diagnosed with a metabolic disorder, and Jurgen Klopp has been in touch with his former player.
Mario Gotze will miss an unspecified period of further time for Borussia Dortmund after tests uncovered a problem.
Jurgen Kohler is adamant there will be plenty of interest from across the continent if Mario Gotze fails to succeed at Borussia Dortmund.
While Mario Gotze has struggled on his return to Borussia Dortmund, Lothar Matthaus does not believe another move is the answer.
Borussia Dortmund coach Thomas Tuchel is adamant Mario Gotze still has a role to play at the Signal Iduna Park.
David Alaba has praised his former Bayern Munich team-mate Mario Gotze and feels the Germany international deserves more respect.
Mario Gotze has promised to improve performances for Borussia Dortmund but still feels that he gets a rough ride from some critics.