Hearts manager John McGlynn was thankful for the experience of his bench for providing the extra spark to help defeat Dundee.
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The home side won the Clydesdale Bank Premier League encounter 1-0 with John Sutton coming off the bench to score the winning goal four minutes from the end.
A young Hearts side had dominated the game but failed to find a way through a resolute Dundee defence until a late double substitution finally broke their resistance.
"The players were a bit tired and bringing on those fresh legs got us the goal," said McGlynn. "We're delighted that we got the victory.
"I think we deserved three or four more goals. I felt we were in control of the game, but obviously we hadn't taken the chances until that point.
"In fairness to us I thought (Dundee goalkeeper) Rab Douglas had an excellent game, he always seems to have a good game against us.
"We had many young players out there on the pitch, just as we did on Saturday.
"I said when I came in that there would be no better time to be a young player at Hearts. There are more and more appearing in the team and that makes our bench more experienced because of that.
"You saw we were able to turn to Sutton and Novikovas, but we also had Andy Driver, Medhi Taouil and Darren Barr. These lads will respond and it should make the whole squad stronger."
Dens Park boss Barry Smith watched his side hold firm for 86 minutes but wasn't pleased with the overall performance of his side as they allowed the hosts to dictate the play.
"I thought we had handled them relatively well, although they had a lot of possession," Smith said after the game.
"We feel we can do better all over the park. The past two games we've created a lot of chances, we didn't tonight and credit to Hearts for that. We set ourselves out in an attacking system, but possibly it didn't work."