Robbie Neilson believes poor defending and a lack of cutting edge in front of goal proved to be Hearts' downfall as Raith Rovers left Tynecastle with a 3-2 win on Saturday afternoon.
The visitors raced into a 3-0 lead early in the second half before a Hearts fight back, featuring two Liam Boyce goals, saw Robbie's men go close to securing a point at the end.
Speaking to Hearts TV, Robbie said:
"I thought we were poor in the first half, we didn't move the ball quickly enough and we spoke about that at half-time.
"We lost a couple of early goals in the second period which were disappointing, we then went on to create enough chances that could have seen us get not only a point but probably even three," he explained.
"The penalty at the start of the second half, I've watched it and there's no contact. At the third goal there was a hand ball at the end, but we shouldn't be getting caught out like that in the first place and that has to be miles better from our point of view.
"Jame Macdonald made some world class saves today but we had so many other opportunites, cut-backs, one on one with the keeper and we didn't take them and that's ultimately why we lost the game.
"Ultimately, we can't give away goals in that manner, we understand that and we need to rectify that on Tuesday night. We just have to get back to winning ways."