Hearts beat Ross County 2-1 at the Global Energy Stadium on Saturday to stay two points clear at the top of the Ladbrokes Premiership.
Osman Sow and Alim Ozturk scored early on in Dingwall as Robbie Neilson's men maintained their 100% record. Liam Boyce pulled one back from the penalty spot.
Celtic stay second following a 4-2 victory over Inverness CT at Parkhead, with goals from Mikael Lustig, Leigh Griffiths and Stuart Armstrong (2). Ryan Christie and Dani Lopez reduced the deficit.
Aberdeen made it three wins out of three as they came from behind to beat Motherwell 2-1 at Fir Park. Marvin Johnson scored early on for Well but Niall McGinn equalised and Ash Taylor headed the winner for the Dons.
Hamilton Accies thumped Dundee United 4-0 at New Douglas Park thanks to goals from Ali Crawford, Lucas Tagliapietra, Carlton Morris and Christian Nade.
Dundee overcame St Johnstone 2-1 in the Tayside derby at Dens Park. James McPake and Kane Hemmings struck in the first half and Steven MacLean's goal early in the second period wasn't enough for Saints.
Partick Thistle drew 2-2 with Kilmarnock at Firhill. Kris Doolan twice had the Jags in front but Rory McKenzie and Kris Boyd replied for Killie. Thistle had Liam Lindsay sent off midway through the second half.
