Mark Hughes believes QPR can surprise Manchester United if they put in a similar performance to that shown against Arsenal last weekend.
Sir Alex Ferguson's side come into the Old Trafford clash looking for an eighth successive Barclays Premier League victory, although the Hoops' aspirations are at the other end of the table.
QPR are running out of games to stave off relegation but head to the north west on the back of a morale-boosting 2-1 victory against Arsenal.
Rs boss Hughes was proud of his side's performance against the Gunners and wants more of the same on Sunday.
"The three points was the main thing but the pleasing part from my point of view was the manner of the performance," the Welshman said.
"I think from start to finish it was a good, solid performance and we had a good understanding of what we had to do to go and get a result against them.
"The lads went out and performed to the letter so really, from my point of view, we have to keep on replicating that and the application that we showed.
"The determination to see the game through to its conclusion was there for everybody to see so if we show that in the games we have remaining we will pick up more points, which is obviously the order of the day."
The Hoops also recently overcame Liverpool and Hughes believes the bigger sides bring the best out of his team.
"I think [we have raised our game against the top sides], certainly at home," he said.
"Our home form has been decent, it is only in these games where we have been down to 10 men we have struggled at home.
"Against the top sides, I think we have really acquitted ourselves well.
"We go into those games thinking that we will give it our best shot and that has helped us and has enabled us to get really positive results.
"Obviously leading into the game against Man United, you have to have a positive approach.
"I don't think you can go to Old Trafford and have fear because United will sense that and exploit that.
"You have to be positive, have belief in what you are trying to do on the day and see where it takes you."
Asked why his players act differently against the big names, Hughes added: "It is difficult to put your finger on it.
"Maybe a little bit of the pressure is off, there is no expectation from outside the club about what we can do against the top teams.
"Against Liverpool and Arsenal in recent weeks, we obviously weren't expected to win and it will be a similar case on Sunday as well.
"We're not expected to take anything out of that game but is about time we started picking up points on our travels
"There is no better place than Old Trafford to make a statement of intent given the games we have to face.
"If we can go there and obviously take something from United, that will be great for us in terms of confidence and belief."
Hughes will again be without Djibril Cisse for the trip to Old Trafford through suspension, although he can call upon DJ Campbell and Heidar Helguson once again.
Both strikers have been sidelined for more than two months, but top scorer Helguson returns from a groin injury and summer signing Campbell is back after a hamstring problem.
"They are in the squad and are available," he said. "They have obviously had more work this week and they are an option.
"DJ is probably a little more ahead than Heidar because he has had a couple more weeks training, but they are both available.
"Fitz Hall is not available, Armand Traore is still not fit and apart from that everybody is available apart from long-term injuries.
"Alejandro Faurlin has returned to the club this week and it was good to see him.
"He is progressing and he will probably go back for another week in Spain and then after that he will back doing his rehab here."