Craig Levein was left angry at his players after their performance in the 1-0 loss to Kilmarnock at Tynecastle.
A poor first-half saw the Jambos trail thanks to a Chris Burke header and although they dominated large spells of the second-half, they were unable to find an equaliser.
"I’m angry after that," Craig told the media after the match. "We didn’t do enough to win the game. If we look at the stats we probably had more possession and better chances, without having the balls to dig deep when we need it.
"Everybody on the field was waiting on someone else to change the game. Did they try? Arguably. Did they try hard enough? Absolutely not."
And the manager conceded he will be forced to make changes as players have not performed well enough when given the opportunity.
"I’ve been at a point in the past four to five weeks where my job was to help the players with their confidence. I’ve reached the stage where I have some players coming back from injury and the message to the others was ‘don’t come knocking on my door if you’re not selected’ because they’ve had plenty of opportunities in the other players’ absence. Today they weren’t good enough."
"If they want to stay in the team they need to improve. Many players have had opportunities due to injuries but if they want to stay in the team, they have to do better.
"You can try or you can burst a gut, and the fans expect the latter. They can run and point to the numbers saying how much work they did, but when it’s difficult and the fans are on their back, they need balls to deal with it and too many felt sorry for themselves and went into a shell today."