Celtic have the chance to move nine points clear in the Scottish Premiership when they face St Johnstone at Parkhead on Wednesday, kick-off 7.45pm.
Ronny Deila's side defeated nearest challengers Aberdeen 4-0 on Sunday and have won all 10 of their domestic matches in 2015.
The only player to beat keeper Craig Gordon during that run was St Johnstone striker Michael O'Halloran, when Celtic won 2-1 at McDiarmid Park last month.
Tommy Wright's team go into the game on the back of a 0-0 draw at home to Kilmarnock and another draw would be enough to take them level on points with sixth-placed Dundee.
Kris Commons, Emilio Izaguirre, Mikael Lustig and Charlie Mulgrew are all ruled out for Celtic while Frazer Wright and Simon Lappin are sidelined for Saints.
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