The Polish international scored all four goals of last night's 4-1 win over Jose Mourinho's Spanish champions, and has been linked with a move to both Manchester United and Bayern Munich in the past.
The 24-year old is out of contract at Dortmund at the end of next season and the player has suggested he is not interested in signing a contract extension at the Westfalenstadion.
However, following last night's victory, which puts Dortmund on the verge of the Champions League final, manager Jurgen Klopp said:
"I do not have the feeling that Robert is on the run and we are not the ones to send him away.Lewandowski became the first player in history last night to score four goals in a Champions League semi-final and the first to score a hat-trick against Real Madrid in Europe. In December, reports emerged suggesting he had already signed a £20.5 million deal with United, and would move to the Theatre of Dreams for an £18 million fee.
"Let's wait and see what happens next."
But Bayern Munich have since emerged as contenders for his signature and his market value will have sky rocketed after last night's showing.