Pierre-Emerick Aubameyang has had a cheeky pop at former Borussia Dortmund teammate Henrikh Mkhitaryan over his Manchester United move.
Aubameyang, who himself has been the subject of transfer speculation this summer, admitted he was not happy with how Mkhitaryan handled his departure.
Aubameyang said: "In the end, all involved have to be pleased with it, and you still have to be able to look each other in the eye.
"It's about how you do it. And a few things were done in public recently which were not okay, and which you are not necessarily able to relate to as a colleague."
Aubameyang then went on to promise that if he left Dortmund the situation will run 'smoothly'.
He added: "Those who know me, know that I am an open and honest guy, and it will always stay like that.
"Should there be talks about a transfer one day, things will run smoothly, I promise that."