Liam Boyce scored the winner from the penalty spot as Ross County edged out Dundee in Dingwall.
County took an early lead when Tim Chow turned home Liam Boyce's cross before Darren O'Dea levelled from the penalty spot.
Jim O'Brien was sent off for a second booking before Boyce slotted home from the penalty spot to put County back in front.
Danny Williams saw red for Dundee late on as County sealed the points.
Ross County 4-4-2
Naismith, Fraser, Davies (c) (McEveley 34 (Tumilty 78)), Van Der Weg
O’Brien, Woods (Routis 24), Chow, Gardyne
Unused subs: McCarey (gk), Schalk, Lalkovic, Dow.
Goals: Chow (6), Boyce (89 pen).
Booked: Davies (foul on Ojamaa), O’Brien (foul on McGowan, and simulation), Curran (barging/pushing in melée).
Sent off: O’Brien (two yellows).
Dundee FC 3-5-2
Gomis, O’Dea (c), Holt
Kerr, O’Hara, Vincent, McGowan, Williams
Ojamaa (Wighton 61), Haber
Unused subs: Mitchell (gk), Hateley, Ross, Klok, Higgins.
Goal: O’Dea (44 pen).
Booked: O’Dea (foul on Boyce), Williams (foul on Naismith, and dissent), O’Hara (simulation).
Sent off: Williams (two yellows).
Attendance: 2,819 (277 Dees).
Referee: John Beaton. Assistants: Alastair Mather, Andy Milne. Fourth official: Gavin Duncan.