Schalke midfielder Lewis Holtby could leave the club for Tottenham Hotspur during the current transfer window, according to the Bundesliga side's general manager Horst Heldt.
Holtby, 22, has agreed to join Tottenham in the summer on a free transfer, but it has been speculated the Germany international could arrive this month - following the news of Sandro's knee surgery.
And Heldt is quoted by Reviersport as saying that "Tottenham are considering" securing the midfielder's services earlier than the summer.
It is reported that Schalke are keen to tie up a deal for Lyon winger Michel Bastos, which, if a move is agreed, could trigger a January switch for Hotlby.
"I don't know whether I can say at 100% that I'll remain at Lyon until the end of the season. My desire is to stay. But, if there are offers, we'll talk,” Bastos told the club's official website.
Bild reports Schalke have already agreed personal terms with the Brazilian, but a transfer fee has yet to be struck, with Schalke willing to pay €5 million and Lyon asking for a minimum of €7 million.
"You all know, the transfer window is still open. It does not close before the January 31," Heldt said. "There can always be players coming but also players leaving. That is open and stays open."