Aberdeen's unbeaten home record shattered as five-star St Johnstone run riot at Pittodrie.
Ryan Christie allowed his parent club Celtic to move closer to Premiership leaders Aberdeen with a winner for Inverness.
Hearts and Hibernian reached the last eight of the League Cup, at the expense of Kilmarnock and Aberdeen respectively.
Ross County continued their impressive start to the season after Liam Boyce’s header secured a 1-0 win over Partick.
Kilmarnock's 2-1 home victory over St Johnstone was marred by an injury to goalkeeper Jamie MacDonald.
Kilmarnock boss Gary Locke wants his players to build on their success after their 2-1 win against Dundee United on Saturday.
St Johnstone, Kilmarnock and Dundee all won, while Motherwell drew with Ross County in the Scottish Premiership.
Greg Kiltie has rejected a new contract offer from Kilmarnock but is relaxed about on-going discussions with the Ayrshire outfit.
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