Schalke coach Roberto Di Matteo has increased speculation that Real Madrid midfielder Sami Khedira could move to the club, saying: "He is world class. If he wants to join us, the door is open."
Germany international Khedira is out of contract at the Bernabeu in the summer, and has said he will be leaving the Champions League holders.
Schalke have been heavily linked with a move for the 27-year-old as speculation that he will choose to return to the Bundesliga grows.
But Khedira insisted he had yet...