Wolfsburger Allgemeine Zeitung reports that Schalke could make a move for the 31-year-old striker.
Schalke coach Felix Magath has reportedly been handed a €30million transfer kitty and is determined to fight for the Bundesliga title this season.
Schalke have already signed players such as Atsuto Uchida, Sergio Escudero and Raul this summer.