Schalke are among the clubs tracking Polonia Warsaw winger Pawel Wszolek, according to Polish newspaper Gazeta Wyborcza.
Austria Vienna and Red Bull Salzburg are also said to be keen on 20-year-old Wszolek, who made his debut for the Poland national team earlier this month.
"Several clubs are interested. There is no need to deny it," Polonia chairman Ireneusz Krol is quoted as telling the newspaper. "He has been monitored by scouts from the Bundesliga, Italy and Austria. We were approached by a Russian club only recently."
Wszolek, who is capable of playing on either flank, has made 45 appearances for Polonia, scoring ten goals and providing ten assists. In ten games this season, he has netted seven times.
It is believed Wszolek, under contract until 2014, would be free to leave the club during the winter break for between €2.5 million and €3 million.