Celtic, Premier Sports and Rangers
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Alan Forrest scores to put the pressure back on St Mirren. Roland Idowu scores via a kiss off the crossbar. It's a good height for Shamal George and he goes the right way and saves. Marcus Fraser scores for the hosts. Stephen Kingsley sends Shamal George the wrong way. Richard King squeezes in St Mirren's first penalty.
The games are coming thick and fast for Russell Martin as he looks to avoid any major upsets and book a last eight spot
All eight matches to be broadcast on TV or live stream Celtic have been handed a Friday night fixture in the Premier Sports Cup last 16 following confirmation of the TV picks, dates and kick-off times.
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.