Stoke forward Bojan Krkic will miss the rest of the season after suffering a ruptured cruciate ligament in his left knee, the club have announced.
Stoke manager Mark Hughes said the injury is "bitterly disappointing" for both the player and the club.
Stoke City have signed German international Philipp Wollscheid on loan.
The Potters have welcomed the 25-year-old with a view to permanently signing the defender.
Sorry, this content isn't available on your device.
Stoke City manager, Mark Hughes, says his side will be hoping to keep up their recent good form against Arsenal when they host the Gunners this weekend.
Stoke have lost just once in eight games against Arsenal at the Britannia Stadium.
Hughes says the fans are a big part of the side's performances and is calling on them to make life difficult for the visitors.
Stoke City twice lost a one-goal lead at Queens Park Rangers, to come away from Loftus Road with a 2-2 draw.
Mame Biram Diouf's header put the visitors ahead in the 11th minute, before Steven Caulker equalised on the stroke of half time from very close range.
It didn't take Stoke long to bounce back after the break - Peter Crouch's left footed shot from the centre of the box to the top left corner putting them into a 2-1 lead.
But Niko Kranjcar denied the visitors the win, scoring from a free kick to level the score in the 88th minute.