Pierre-Emerick Aubameyang has posted a message to Borussia Dortmund on his official Instagram account.
Aubameyang officially left Dortmund on Wednesday morning, with the Gabon international joining Arsenal for £60m.
The 28-year-old has now taken to social media to apologise to Dortmund for the manner of his exit.
"First of all sorry for everything that happened in the last month. But I wanted to change last summer, it did not work, but now it had to be," read the post.
"Maybe it was not the best way I chose, but everyone knows that Auba is crazy - and yes, I'm a crazy kid, hahahaha! I've made mistakes, but never with malice.
"I will never forget these four and a half years at Borussia Dortmund, because you all gave me the strength for the level I am now. Thanks to the whole BVB family, the fans, the club, the staff and of course my teammates! Your Auba17 !!!"
Aubameyang, who scored 141 times in 213 appearances for Dortmund, is expected to make his Arsenal debut in Saturday's Premier League clash with Everton.
