By ESPNSTAR.com staff
A 10-man Bayern Munich side wrapped up the win after first half goals from Mario Gomez and Xherdan Shaqiri to seal a spot in the last eight of the competition.
Heynckes stated that he was preparing for a tough fight in their last fixture before going on a winter break.
"We knew it would be extremely tough," Heynckes told the club's official website.
"It's the last match of the year. The players have already moved on mentally.
"We didn't play well in the first half. In particular, our switching from defence to attack malfunctioned. We've had a lot of matches so far this season, and you have to accept you'll have an off day."
Despite Franck Ribery picking up a red card in the 47th minute for slapping Koo Ja-Cheol, Bayern were able to close out the victory, but Heynckes remained critical of Ribery's reaction despite winning the match.
"The red card was the result of provocation, but there's no disputing the decision. FC Bayern players have to brush that kind of thing off.
"We were much better in defence after the substitutions, and I knew we'd always be a threat on the break.
Bayern currently hold a nine-point lead over second-placed Bayer Leverkusen in the Bundesliga and Heynckes was delighted in the position which they have finished the year inl.
"Overall I'm very satisfied, because we've been outstanding for long periods in the first half of the season. It can't go better than this," he said.