Mueller is on the Nerazzurri's transfer radar and he will ponder his future once Euro 2012 has come to an end.
"Given my present situation, I have to give it some serious thought," the forward told BILD on Wednesday.
"I'm a bit concerned by the fact that I was not always in the starting line-up for the important games. That was something new for me and caused me some problems.
"For now though I am just concentrating on Euro 2012."