London - Stoke City midfielder Steve Sidwell will be sidelined for up to six weeks after sustaining a knee ligament injury in Saturday's 1-0 defeat at Liverpool.
"The medical people are telling me it's likely to be four to six weeks," City manager Mark Hughes told reporters.
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"It's a blow to us going into the Christmas period with the amount of games we've got."
Stoke, who are 12th, travel to fourth-placed Manchester United on Tuesday looking to avoid a third successive Premier League defeat.