Ross County manager Malky Mackay will assess Connor Randall on the day of the match against Celtic to check if he has shaken off a sickness bug.
The 26-year-old defender went off early in the 3-2 win over Dundee at the weekend after vomiting on the pitch.
Alex Iacovitti is still sidelined with a hamstring injury.
Celtic’s attacking options have diminished further ahead of their trip to Dingwall.
James Forrest is out and Mikey Johnston is a doubt. Kyogo Furuhashi, Albian Ajeti, Jota (all hamstring), Giorgos Giakoumakis (knee) and Karamoko Dembele (ankle) were already missing.
Defender Christopher Jullien (knee) remains a long-term absentee.
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