The German club's sporting director has denied claims that teams have already made offers for the Borussen forward
The Polish star is well sought after with Juventus and Manchester United strongly rumoured to be chasing him, but the German club are insistent that no bids have yet been made.
"As it stands there is neither a request nor a formal offer for Robert Lewandowski, [so] how could we have possibly rejected anything?" Zorc told Spox.
The striker has refused to extend his contract with Dortmund beyond 2014 and the Bundesliga side are now set on selling him, but it appears the 24-year-old will have to wait until the summer before moving.
However, an anonymous board member has claimed to Focus that Lewandowski is certain to leave BVB come the season's end.
"We do not know where he will go but the departure of Robert Lewandowski [at the] end of the season is a done deal," the alleged official was quoted as saying by Focus.