McInnes set for defensive change

St Johnstone will be without suspended defender Michael Duberry for Saturday's home clash with Aberdeen.

Derek McInnes is also likely to be without Steven Milne and Peter MacDonald through injury, but there is a chance Andy Jackson may return to the matchday squad. On-loan forward Jackson came through a behind-closed-doors game against Motherwell in midweek and is understood to have come through unscathed.