Mkhitaryan chose BVB ahead of Liverpool last summer when deciding to leave Shakhtar Donetsk.
He said: "Of course I know how much Liverpool wanted me, but what happened, happened.
"I'm now in Dortmund and very happy and proud about it.
"Can I see myself at Liverpool in the future? You know that it doesn't depend entirely on me. But this is life and everything is possible."
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball