It's been an excellent start to the season for Hearts who will be reluctant to change a winning formula this weekend.
The Jambos clash with Celtic for the second time in as many weeks in tomorrow's Premier Sports tie, hoping for a repeat of their 2-1 win in the Scottish Premiership opener.
St Mirren fell victim to the same scoreline a week later, but a trip to Glasgow will be a completely different challenge for Robbie Neilson's men.
The Tynecastle boss changed from a 3-4-3 into a 3-5-2 mid-game against the Hoops. And it paid off as John Souttar 's header snatched all three points for the home side.
This showed a flexibility in the newly-promoted side that could be very dangerous this season, particularly in the bigger games.
Hearts are yet to concede a goal in this year's league cup after making it four wins out of four in July's group fixtures, and again, Neilson has no reason for any major shake-ups as he looks to lead his team to seven consecutive wins this season at Parkhead.
It also looks to be a clean bill of health throughout the squad with no new injury concerns going into this one - much to the delight of the manager, whose starting XI is unlikely to surprise anyone.
Predicted Hearts team: Gordon, Souttar, Kingsley, Halkett, M Smith, Halliday, Baningime, Cochrane, Ginnelly, Mackay-Steven, Boyce.
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