Celtic, Premier Sports and Rangers
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Scotland head coach Steve Clarke and Scottish FA chief executive are in attendance at St Mirren v Hearts. Clarke will soon name his squad for next month's opening World Cup qualifiers, while Maxwell is a former St Mirren player. Who could he be watching? Scotland internationals Lawrence Shankland, Zander Clark and Stuart Findlay are all in action.
The games are coming thick and fast for Russell Martin as he looks to avoid any major upsets and book a last eight spot
A much-changed Rangers side booked their place in the Premier Sports Cup quarter-final with a 4-2 win over League One Alloa Athletic but the
Scotland's other European representatives enter the fray after Celtic beat Falkirk as the Premier Sports Cup switches to a knockout format for the second round.