Rangers' Wallace is in race to face Celtic
Rangers boss Mark Warburton is keeping his fingers crossed skipper Lee Wallace has not suffered an injury which could rule him out of Saturday's Old Firm clash.
The left-back sustained a worrying knock 10 minutes from the end of Gers' narrow 1-0 win over Inverness at Ibrox on Saturday.
With the Light Blues' substitutions used up, Wallace was forced to hobble through the final stages as the hosts clung on for a victory secured thanks to Brad McKay's first-half own goal.
But they trail the Hoops by 14 points with a game more played.
Gers face St Johnstone in Perth on Wednesday before welcoming Celtic to Govan for the first time in four years on Hogmanay.
And Warburton is desperate to have his captain available to face Ulsterman Brendan Rodgers' rampant Premiership leaders.
Asked what the prognosis was for the defender, the Rangers manager said: "We thought it was an impact injury from the corner. He got a bang going for the ball.
"Hopefully it's nothing too serious."
Gers clinched their fourth straight win but there was none of the spark of their victories over Aberdeen, Hearts and Hamilton.
McKay turned the ball into his own net after 13 minutes when he failed to get out of the way of Martyn Waghorn's cross.