Kilmarnock manager Derek McInnes says he does not know what to expect when he takes on former Rangers team-mate Alex Cleland in the dugout on Wednesday night.
Cleland has been appointed caretaker manager at St Johnstone following the sacking of Steven MacLean and McInnes is wary of a potential surprise.
“In terms of preparation for the game, it’s a wee bit of the unknown,” said McInnes, whose team have won their last two matches.
“Alex is somebody I know really well but you never really know what’s going on inside the club and how they are going to prepare for the game. There might be a change of shape, change of personnel.
“Sometimes when a caretaker manager goes in, it’s a fresh slate and maybe players who have not been playing might come to the fore a wee bit.
“We really just need to focus on our performance, be prepared for every eventuality in terms of what team and shape comes in from them, and just try to get to our levels.
“The longer teams like ourselves can stay unbeaten and go on winning runs, and if we can have a few of them spread out through the course of the season, then it will certainly help our aims. That’s the job again, to try and get a similar level of performance.”