Boruc added to his excellent reputation this summer by impressing for Poland at Euro 2008 and has been linked with a move to the likes of AC Milan.
But the 28-year-old is unaware of any official approaches being made.
He said: "The top 10 clubs in the world are prepared to pay £15million for a striker but not a 'keeper.
"I don't know if any other club wants me. I had a good season with Celtic and we won the championship for the third time in a row.
"I enjoyed the experience of playing in the Champions League with Celtic and the European Championship with Poland although I was disappointed we didn't make the quarter-finals."