A lot has been made of Hearts' good record against top-six opposition this season.
As we approach the split, Hearts are five points ahead of Celtic, six ahead of Rangers and ten clear of dark horses Motherwell.
However, there are still four games to go before the split begins and, as we saw in the only Premiership game over the weekend, there is no margin for error.
Motherwell were unbeaten in nine league games when they turned up to Dens Park, and many would have predicted another victory for Jens Berthel Askou's impressive side.
But Dundee are no pushovers under Steven Pressley and that proved to be the case, as Fin Robertson slotted home a dramatic late winner for the hosts and dealt Motherwell's unlikely title changes a potentially fatal blow.
So what can Hearts learn from this?
Simple. There is no room for complacency in their next four fixtures, even if they look particularly winnable on paper.
First up, it's Kilmarnock away from home. The second bottom side, struggling in a relegation scrap. They’re way down there in the form table, too, so an easy three points, surely?
Unlikely. A 3-0 win over Aberdeen and a 4-3 win over St Mirren show they can score plenty in front of their own supporters, while the 3-2 loss to Celtic had them two goals ahead before a late rally from Martin O'Neill's side.
Add into the mix Hearts' current injury crisis. There will be no Lawrence Shankland, no Stuart Findlay, no Stephen Kingsley, and no Ageu against Killie. There might be returns for Oisin McEntee and Cammy Devlin, but they won't be fully fit.
After that, it's Dundee at home. The form team in the bottom six. Nine points from their last six games have soothed any lingering doubts about Premiership survival and they have gone from strength to strength.
Looking back at last year, a 1-0 loss to Dundee at Tynecastle in the first game of the split proved to be the undoing of Neil Critchley. He was sacked in the aftermath. There will be no such drama this time, but will the fixture again prove a sliding doors moment?
The penultimate pre-split game is Livingston away. We’ve seen what Marvin Bartley’s side are capable of on their day, just look at the 2-2 draw with Rangers. In August, it took Hearts until the 91st minute to find a winner through Alexandros Kyziridis.
But, this is a side rock bottom of the league, seven adrift with just one win in the league. Yes, they're fighting for their survival, but Hearts are fighting for a title.
Finally, the toughest of the lot. Motherwell at home. This could be the game it all hinges on. Points lost, ground made up, a door left ajar for their Glasgow rivals? Anything could happen.
How does Derek McInnes play it? Does he play to Hearts strengths, or try to negate Motherwell's entertaining, one-touch play? Should he try and bully the midfield, akin to the likes of St Mirren and Dundee, who got positive results with that method?
Only the head coach will know. But it's fair to say there won't have been as much riding on a Hearts v Motherwell game for a very long time.
