Cammy Devlin makes way for Blair Spittal as Hearts make their fourth substitution.

Malachi Boateng has made a difference for Hearts since coming on. He forces a corner to keep the Hearts momentum up.

Yan Dhanda's initial delivery is cleared but when he gets another chance to cross, Yutaro Oda brings out a brilliant save from Jon McCracken.

Hearts needed to get the next goal and that they did.

Around 25 minutes left. Have Steven Naismith's side got two more in them?

Dundee thought they had a fourth when Lyall Cameron netted but a VAR review kept their lead at three.

Image source, SNS

Image source, SNS

Hearts are pushing again. Yan Dhanda catches a cross on the volley and it bounces up on to the top of the bar on its way out.

The visitors are starting to threaten in this second half.

Ziyad Larkeche slides into Hearts' Gerald Taylor and the referee's patience has been exhausted. It's a yellow card for the Dundee player, most likely for persistent fouling.

Dundee thought they had a fourth but VAR has intervened.

Lyall Cameron scored from close range but Hearts were immediately protesting about an apparent handball by Mo Sylla earlier in the move.

On review, the goal is indeed disallowed and free-kick awarded to the visitors.

Much better from Hearts.

James Penrice attempts a shot from the left, which takes a deflection, and it takes a fine save from Jon McCracken to keep Dundee three up.

Dundee get things going for the second half.

Hearts make three changes and it's not much of a surprise.

Yan Dhanda, fellow recent signing Malachi Boateng an Yutaro Oda are coming on.

Barrie McKay, Jorge Grant and Daniel Oyegoke do not re-appear for the second half.

Players getting ready to start the second half at Dens Park. Hearts changes afoot.

Image source, SNS

Ross County manager Don Cowie tells BBC Scotland: "When you score so late, you're obviously delighted. I felt we deserved the equaliser on our first-half performance.

"We were really good first half, didn't manage to get the goal that the play merited. But we kept going until half-time.

"Disappointed to lose such an early goal in the second half and it gave Dundee United real momentum and control in the game. We kept going and showed great character.

"You can see Ronan [Hale] is getting fitter and more used to the way we play, the intensity we work at. He's a natural finisher, more often than not he'll hit the target. He has that sniff of being in the right place at the right time."

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Dundee United manager Jim Goodwin tells BBC Scotland: "Real disappointment in the way we concede the equaliser. There was a number of poor decisions in that particular sequence of play.

"Did we deserve to win the game over the piece? Probably not, given how poor we were in the first 45 minutes. You've got to see the game out and had we done that, it would've been a brilliant three points.

"We know how difficult it is up here. Ross County had only lost one of their last 11 games here. The response after half-time is a positive but it'll take time to get over the way the game finished.

"The only way was up at half-time as far as we're concerned. We were so bad in the first half, a shadow of the team we were against Dundee in the first half last week. It's hard to put your finger on why that happens."

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Motherwell manager Stuart Kettlewell tells BBC Scotland: "We're a little bit disappointed not to [get a result]. I thought Rangers were excellent first half, they were slick in their general play.

"We were a little bit timid in the first half and we rectified that. The lads did really well, particularly in the second half."

On mounting injury concerns, he adds: "I've never seen [a situation] like it. I think it's up to nine now and every one could be a starter.

"We've continuously had to dip into our academy. Everything in the dressing room is what we have available."

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Rangers manager Philippe Clement tells BBC Scotland: "The intensity we started with was really good. We score the first goal then out of nothing a goal against that's really unlucky.

"It's important that the team continues in that way and doesn't start to doubt. The team did that, there was no doubt and we scored a very good second goal.

"We kept on pushing to score the third and fourth. Our finishing could have been better in that way."

On match-winner Vaclav Cerny, he adds: "He loves the way we want to play football. He's felt at home from the first minute. He's going to be very important for the squad."

Let's get some quick reaction from the action earlier today...

Allan Preston
Former Hearts defender on BBC Sportsound

They are good value for it. Hearts have been dreadful and have got what they have deserved.

Dundee have showed the right attitude - they have been magnificent.

Image source, SNS

An early goal, an own goal and a penalty have Dundee well in command and very much on their way to a first Scottish Premiership win of the season.

Scott Tiffoney got the ball rolling before Gerald Taylor put through his own goal. Luke McCowan's penalty made it three.

A lot of work to do for Hearts and they are starting a first defeat of the season square in the face.

Image source, SNS