The experienced coach has voiced his delight with his side's Supercup victory, and feels starting the season on a high will be quite a boost for last year's Bundesliga runner-up
The Bavarians had lost their previous five games against the Bundesliga champion, but goals from Mario Mandzukic and Thomas Muller were enough to secure victory on Sunday as Robert Lewandowski's strike was nothing more than a consolation goal.
"Obviously, winning this game is a psychological boost. Overall we deserved to win, although it was hard-fought," Heynckes stated at a press conference.
"Especially in the first half we played very well with good organization and huge discipline. We had some great moments when we attacked. We were inspired by the early goals.
"Dortmund worked up a head of steam in the second half, and we were not as well-organized and disciplined in defense.
"It was the Supercup, but it was still a preseason game. Both teams can still improve."
Bayern starts the 2012-13 Bundesliga season with an away match against Greuther Furth on Aug. 25.