Second-half goals from Conor Washington and Joel Lynch sealed the win for Rangers and Warburton knows his side need to start taking their opportunities if they are to stay in the division.
He said: “It was disappointing for obvious reasons. 0-0 at half time was just about right, it was a neutral game and we were about six out of ten and we weren’t really threatened.
“We made a mistake for the goal and we got punished then we looked desperate to score. We created chances and we have to take our rewards. Stats mean nothing if you don’t get your rewards. We created chances against a good team and we didn’t take them, it’s as simple as that.
“QPR realised the situation that if we beat them then we go above them and it is a difficult situation for everyone, but I didn’t really feel threatened by them. We knew about their set piece threat, especially from Matt Smith.
“Their goalkeeper played very well. He made a couple of great saves late in the game. Cashy, Ben and Britt had good chances but we have got to take them. For all the possession and patterns of play you have got to put the ball in the back of the net. We created space and created chances but we have got to get the rewards.”
The relegation fight now goes down to the final day of the season with The Reds going up against Ipswich Town at The City Ground, and Warburton knows that they need to deliver a performance to secure Championship safety.
He said: “We are in the mire and we are in a fight but the boys are battle-hardened and have dealt with the pressure. The performance last week showed how good they can be but we go on the road and can’t get the rewards for it.
“We know what we have to do. We have to focus on preparing well and I have given the boys a couple of days to get their energy. We have to work hard, focus on the game and deliver a performance.
“It will be a tough fight. But it is at home, hopefully in front of a packed City Ground, with a good playing surface and it is up to us to deliver a performance.
“We are well aware of the situation next week. We know what is involved and what is at stake. We know the responsibility that we have as players and staff and let’s see how we perform.”