Robbie Neilson’s men left St Gallen with a 2-1 defeat last week and must overturn that one-goal deficit to make the group stages of the Europa League.
The manager rested a few key players for Sunday’s trip to Celtic Park with this massive match in mind and knows Hearts must take the game to the Swiss champions.
This is how we think Hearts will shape up...
1. GK - Craig Gordon
Rested against Celtic, the skipper will come back in and is a key man. Photo: Alan Harvey - SNS Group
2. RD - Michael Smith
The injury to Craig Halkett already leaves the defence a little light on the right side. Smith will come at right-back in a four in to shore it up with his experience Photo: Ross MacDonald - SNS Group
3. LD - Alex Cochrane
Despite his red card against Celtic, he has cemented the left-back or left wing-back berth Photo: Ross Parker - SNS Group
4. RCD - Stephen Kingsley
It's not his natural side, but in the absence of Halkett, he is the most reliable option. He finished in this position last Thursday and was rested at the weekend Photo: Mark Scates - SNS Group