• Celtic have lost four in a row under Wilfried Nancy

• Managerless Kilmarnock are without a win in 10

• Motherwell have kept five straight clean sheets

Four matches in the Premiership on Saturday have plenty riding on them, but Sunday is crunch time at the top of the table.

Leaders Hearts take on third-placed Rangers at Tynecastle, hoping to stretch their six-point advantage, before new Celtic boss Wilfried Nancy aims to make it fifth time lucky by guiding his side to victory over Aberdeen.

Dundee United vs Hibernian (Saturday, 3pm)

Buoyed by beating Celtic 2-1 on Wednesday night Dundee United will feel on top of the world.

They should also be feeling confident given that Hibs have lost three of their last four.

It was 3-3 when these sides met at Easter Road in September and this fixture always seems to provide goals.

Score prediction: Dundee United 2-1 Hibernian

Kilmarnock vs Falkirk (Saturday, 3pm)

Kris Doolan, appointed interim boss following Stuart Kettlewell's dismissal on Monday, aims to bring stability to Rugby Park where Kilmarnock have won only once in the league.

They have taken two points from a last possible 30, a sequence that includes a 3-1 loss at Falkirk.

However, the Bairns have not found the net in four and Doolan's idea of stability could turn into a dour draw.

Score prediction: Kilmarnock 0-0 Falkirk

Motherwell vs Dundee FC (Saturday, 3pm)

Motherwell, the early-season draw kings, are back at it again with three stalemates in their last four games.

The Steelmen have also kept five straight clean sheets, including shutting out both Hibs and Hearts, so would hope to be able to get the better of a Dundee side who have lost six of their last eight.

Score prediction: Motherwell 1-0 Dundee

St Mirren vs Livingston (Saturday, 3pm)

Without a win in their nine away games in the Premiership and without a win anywhere since August 9th, you have to fear for Livingston at League Cup final heroes St Mirren.

The Buddies will be on a huge high after Sunday's amazing Hampden Park triumph over Celtic and they have had a week to recover and surely will feel they can beat anybody after that.

Score prediction: St Mirren 1-0 Livingston

Hearts vs Rangers (Sunday, 1.30pm)

Super Sunday kicks off with a crunch clash between leaders Hearts and improving Rangers, who are now just three points adrift of second-placed Celtic.

The Gers have lost only one of their last eight, or won just four of their last 10 if you prefer a negative spin, as they strive to stay in touch with the top two.

But Hearts have had two fabulous away wins after a sticky little period and avoiding defeat at Tynecastle would represent a good afternoon's work.

Score prediction: Hearts 2-2 Rangers

Celtic vs Aberdeen (Sunday, 3pm)

Wilfried Nancy would have hoped to make history when accepting the Celtic job, but perhaps not in this way.

The Frenchman's reign has begun with four straight losses and the Bhoys have not lost five in a row since 1947.

He can avoid that fate against an Aberdeen side who have had to travel back from Prague following a 3-0 Conference League defeat to Sparta.

However, there is nothing in Celtic's form to suggest that they are certainties to win this match.

Score prediction: Celtic 1-1 Aberdeen