QPR boss Marti Cifuentes said:
"I liked a lot of things, first of all the ability to bounce back after a disappointing last game.
"I liked the fact that despite the fact we didn't start well the game, I was pleased with the efficiency that we showed to take the lead and then to take a bigger advantage before half time.
"We were angry after the last game and we wanted the three points and I think that was very important."
On Ilias Chair: "I think Ilias is one of the best players in the league. I'm pleased that today he scored two goals, he's not too happy with me because he wanted the hat-trick and I subbed him.
"He's a fantastic player and it's a bit sad that we missed him for such a long time at the beginning of the season.
"I'm happy that he's back [and] happy that he's performing well."
On Koki Saito: "Since day one he's looked very into the pace of the game, so it was about what he needed to learn tactically about the game, about the league itself.
"He has been showing that he's a really good player in the last third, fantastic in one v one on both flanks, especially on the left – he has a trademark where he is one v one on the edge of the box and is very difficult to stop."
Derby County boss John Eustace said:
"Really disappointed with the result, I've learned a lot about the group tonight.
"I'm excited about working with them next week. There's lots we can improve on and that improvement comes from work on the training ground.
"I think we started really well and the goal they scored knocked the wind out of our sails. And then you can see the group are lacking a little bit of confidence and unfortunately we didn't defend the box well enough for the second, third and fourth goals, so lots to improve on and that's what I'm excited about."