Mats Hummels is not expecting to be welcome at Dortmund when Bayern play them in the DFL Supercup next week.
The defender returned to Bayern Munich after eight seasons at Dortmund, where he won two bundesliga titles.
And Hummels accepts he will be a target at his former home when Dortmund and Bayern contest the first piece of silverware on offer this season.
“The boos from the Dortmund fans will come but it won’t change my appreciation [of them and the club],” he told reporters on Saturday. “The game will be very special for me.
“The decision to move took a lot of strength and it gave me a headache for several weeks – it was a long and difficult process.
“Dortmund and Bayern are the only clubs I’ve played for but Bayern are one of the best three teams in the world and have the chance to win everything every year. In the end, that was the decisive factor.”
Bundesliga champions Bayern reportedly paid in excess of €35 million to sign Hummels, but the man himself feels that is merely a sign of the times.
He added: “Of course, the amounts are very high but when there is so much money floating round, it is understandable that there is this kind of transfer fee. For good players you just have to give more.”