QPR head coach Julien Stephan said: "When you lose against a top, top team, you have to accept [it]. And they are better than us. This is the reality. They deserve their win.
"They had more quality, individually and collectively. More quality with the ball and without the ball. I have to say that we lost against a better team than us.
"We will not face an opponent like this every time, but we need to be able to show more quality in possession.
"In the last three games we didn't score. In football if you don't score and are only in defensive positions it's very difficult to get a good result.
"Of course we are not happy. It's a difficult moment when you lose three games in a row and you concede many goals.
"But I want to protect my players, because I know them and I know they tried to give their best. We need to stay together."
Middlesbrough head coach Kim Hellberg speaking to BBC Radio Tees:
"Very happy with everything. I think the performance overall was brilliant, the way we press[ed], the way we play[ed], combining some beautiful goals [with] some fighting goals, so it was a good, good performance."
On the away support: "Like the players on the pitch, they controlled this game in a very good way.
"They were high, they were loud, they were supporting us all through the game, they were sharing - they were brilliant as always."