New Oxford loanee Jonathan Franks will have to wait for his debut after being sidelined through injury.
The 21-year-old striker dislocated his shoulder in a behind-closed-doors friendly against Bristol City on Tuesday.
The injury is expected to keep Franks out for a month.
Franks, who has played 30 times for parent club Middlesbrough, moved to the Kassam Stadium on transfer deadline day in a deal that will keep him there until the new year.
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