Inverness Caley Thistle are top of the Scottish Premiership after beating St Johnstone 2-1 on Saturday.
Marley Watkins and Ryan Christie scored in the second half for John Hughes' men at the Tulloch Caledonian Stadium before Brian Graham pulled one back.
Hamilton Accies, who began the day as leaders, slipped to second spot after a 0-0 draw with Kilmarnock at New Douglas Park.
Aberdeen enjoyed a comfortable 3-0 win over bottom club Ross County at Pittodrie thanks to goals from Adam Rooney, David Goodwillie and Peter Pawlett.
St Mirren won 2-1 at Partick Thistle on Friday night and there are two games on Sunday - Celtic v Motherwell and Dundee v Dundee United, which is live on Sky Sports at 12.15pm.