Virgil van Dijk inspired Celtic to a convincing 4-1 Scottish Premiership victory against Ross County at Victoria Park. Van Dijk led the way against the Staggies by heading in an Emilio Izaguirre cross four minutes before half-time after threatening on three earlier occasions. The former Groningen defender scored his second goal in the 52nd minute when he headed in a Charlie Mulgrew corner.
The County substitute Ivan Sproule reduced the deficit in the 67th minute, after replacing Mark Klok, but Joe Ledley scored two headers to underline a ruthless response from Celtic to their Champions League disappointment.
Dundee United continued their fine run of form at Fir Park with a resounding 4-0 victory over Motherwell. Two goals from Ryan Gauld and one goal each for Paul Paton and Andy Robertson capped the win.
St Johnstone beat nine-man Kilmarnock 3-1 at McDiarmid Park. Nigel Hasselbaink opened the scoring before Stevie May scored two goals, one from a penalty.
A Sean Clohessy freak cross did reduce the deficit to 3-1 for the Ayrshire outfit who had Jackson Irvine and Darren Barr sent off in the second half.
Partick Thistle remain without a win at home in the Premiership this season after two goals by Stephen Thompson and one from Conor Newton took St Mirren to a 3-0 victory at Firhill. However, the scoreline did not reflect the match as Partick were left with nothing to show for their dominance and good football. Their misery was compounded with the dismissal of Stephen O'Donnell midway through the second half.
Hearts beat 10-man Aberdeen 3-1 at Pittodrie. The in-form home side were in charge of the match at half-time through Niall McGinn's goal. He subsequently missed a penalty before substitute Barry Robson was sent off in the 55th minute, and the game turned in favour of the visitors.
Hearts manager Gary Locke brought on David Smith and Callum Tapping and Jamie Walker's flick restored parity in the 66th minute before his surging run and cut back for Callum Paterson to score the second. Ryan Stevenson sealed the points in stoppage time with a ferocious strike from the edge of the area.
In the First Division, Rangers beat Airdrieonians 2-0 with second-half goals from Jon Daly and a Lee McCulloch penalty.