The Poland international's representative has claimed that five clubs have contacted him over the winger's availability as he has yet to decide on his future
The 26-year-old played a key role in helping BVB capture their second consecutive Bundesliga title, and his good performances have not gone unnoticed elsewhere.
A number of clubs approached Blaszczykowski's agent ahead of Euro 2012 to discuss a possible transfer, but the Poland international wanted to focus on the tournament before making a decision.
Blaszczykowski's current contract with Dortmund runs until the summer of 2013, and he is believed to be eager to extend his stay at the Bundesliga champions.
However, he is adamant that he has not made a decision about his future just yet.
"It's not true that I have already signed a contract. My current deal with Dortmund still runs [for another season] and I'm focusing on BVB. There's no reason to talk about a contract at this point," Kuba commented.
Blaszczykowski joined Dortmund from Wisla Krakow in 2007.