Liam Bridcutt said Nottingham Forest only have themselves to blame following the defeat against Wolves on Saturday.
The Reds lost 2-1 at The City Ground and the midfielder was left frustrated that mistakes proved crucial in deciding the game.
He said: "Overall we looked solid but today we beat ourselves. Sloppy passes led to their goals and apart from that they didn't really look like causing us much of a threat.
"It is just silly mistakes and they counted on them. It is frustrating as we set such a high standard for ourselves. We want to win every game and we know that with the style of football we play we can leave ourselves open at times but we need to cut out the mistakes."
Forest fell behind early in the second half and Bridcutt said that The Reds need to be more focused at key points in the game.
"It is probably one of the worst periods of the game to concede," he said. "We came out, looked sharp and then gifted them the goal. We need to learn from it, get better and stop being so naïve as a team.
"The last three defeats that we have had are down to our own mistakes and, as a team, we have got to realise that in this league you can't make those kind of mistakes."