Rangers fought back from a goal behind to beat the Hamilton Accies, but Celtic are still three points clear at the top of the Scottish Premier League.
The Bhoys beat Hibernian 4-2, with Captain Stephen McManus firing the home side in front after 32 minutes.
Cillian Sheridan made it two, but Hibs pulled one back before half-time, and levelled just after the break.
Glenn Loovens headed Celtic back into the lead after 76 minutes and Scott Brown added Celtic's fourth late on.
Saturday's other SPL results:
Celtic 4-2 Hibernian
Dundee Utd 2-0 St Mirren
Hamilton 1-3 Rangers
Hearts 1-1 Aberdeen
Inverness CT 1-2 Motherwell
Kilmarnock 1-2 Falkirk
Kris Boyd scored twice as Rangers recovered from a goal down against Hamilton at New Douglas Park.
Hamilton went ahead through Brian Easton's 26th minute header, but Boyd equalised with a late first half penalty.
Five minutes later Boyd headed his second, before Nacho Novo netted a third.