Bristol City have injury concerns over defensive duo Jamie McAllister and Liam Fontaine ahead of Barnsley's visit to Ashton Gate.
McAllister was withdrawn at half-time in Saturday's 2-2 draw with Coca-Cola Championship leaders Newcastle due to a recurrence of a calf problem and is rated as doubtful.
He started at left wing-back in a new-look 3-5-2 formation against the Magpies but if he is ruled out then caretaker boss Keith Millen could revert to 4-4-2, with Cole Skuse slotting in at left-back and Evander Sno coming in on the left of midfield.
Fontaine played no part against the Magpies after failing a late fitness test on an ankle injury but Millen revealed he has a chance of facing the Tykes. Winger Jamal Campbell-Ryce is in contention to face his former club after serving a one-match suspension.
Millen, who took charge of first-team affairs last week following Gary Johnson's departure, is expected to make further changes to his side after revealing there were some tired legs after Saturday's draw.
Ivan Sproule, David Clarkson and Stefan Maierhofer are all pushing for a place in the starting line-up.
Barnsley defender Bobby Hassell is expected to be included in the starting line-up despite injuring his wrist at Ipswich on Saturday.
The left-back fell awkwardly at Portman Road but X-rays have confirmed no bones are broken and he will play.
Fellow defender Rob Kozluk and winger Adam Hammill (hamstring) are expected to return to contention for the weekend but will not be included for the Ashton Gate clash.
Young pair Jacob Butterfield and Reuben Noble-Lazarus were second-half substitutes on Saturday and manager Mark Robins, who has no new injury or suspension problems, must decide whether to hand them bigger roles or stick with the same starting line-up.
Barnsley have climbed up to 12th place in the table in recent weeks but on current form lack the consistency to launch a late play-off challenge.
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