A last-minute equaliser from Thomas Reilly gave St Mirren a late draw against ten-man Motherwell at Fir Park.
Michael Higdon had given the hosts the lead after 80 seconds and they looked good for all three before Shaun Hutchinson was sent off three minutes from time.
Danny Lennon’s side made the most of their numerical advantage as Reilly scored in injury time.
Sunday’s other match saw a stalemate between Aberdeen and Hearts at Pittodrie.
Kilmarnock pulled off the surprise of the day on Saturday, beating Dundee United 3-1 at home to earn their first three points of the campaign.
Ross County could celebrate another landmark as they gained their first-ever top flight win, extending their unbeaten league run to 38 games.
Richard Brittain’s penalty was enough for them to see off Dundee at Dens Park.
Hibernian’s recent revival continued with a 2-0 triumph over St Johnstone at Easter Road.
Paul Hanlon gave the Hibees the lead before Eoin Doyle got his first of the campaign after 53 minutes.
Tony Watt grabbed the headlines and a place in Neil Lennon’s thoughts ahead of the second leg with Helsingborg after scoring a double against Inverness CT.
Watch full match highlights
Aberdeen 0-0 Hearts
Dundee 0-1 Ross County
Hibernian 2-0 St Johnstone
Inverness CT 2-4 Celtic
Kilmarnock 3-1 Dundee United
Motherwell 1-1 St Mirren
