Borussia Dortmund are currently locked in negotiations to sign Rafal Wolski, according to the agent of the Legia Warsaw midfielder.
The 19-year-old is regarded as one of the best young talents the Euro 2012 co-hosts have to offer, and has already been compared to Germany starlet Mario Gotze.
Maik Barthel, who represents Wolski's playing interests, revealed he has spoken with Dortmund sporting director Michael Zorc over a possible transfer.
"We have long been in detailed talks with Borussia Dortmund. Rafal targets the Bundesliga, and not just in 2013," the agent told Bild.
"For Rafal, Borussia would of course be an exciting challenge, but there are also bigger clubs that have contacted us. A decision is to be made at the end of June."
Wolski, who was included in Poland's 23-man squad for Euro 2012, is under contract with Legia Warsaw until 2014, and was reportedly scouted in Saturday's 1-0 warm-up friendly win over Slovakia.
Reports in Germany suggest a fee of around €4.5 million could be enough to lure him away from Warsaw, but it is expected that his value could increase significantly after the upcoming tournament.
Poland kick off their European Championship campaign against Greece on June 8.