The 26-year old Norway international, who is attracting interest from Arsenal among other English clubs, says he is currently happy in Germany but a shift to England's top flight could be an option down the track.
"I have two years left on my contract," he told MirrorFootball.
"Perhaps "I will get a new contract I don't know.
"I play football and my agent takes care of that. If something else happens it will go through my agent.
"We will have to see if something comes and take it from there.
"I feel like I am playing well in Germany against a lot of good defences.
"I look at how the Premier League is and you never know before you try it but I have confidence in myself and big belief so if something happens you never know."