Boro were neck and neck with the R's until late on, when Leroy Fer gave away the penalty that lost the game for the visitors.
Fer, naturally, got plenty of stick. But there seemed to be far more criticism for Green after the game. Not just for the penalty incident (many defended him, anyway), not just for his performance overall. Indeed, many QPR supporters aren't happy with the 35-year-old for his form in general.
It's not the first time R's fans have had a go at Green this season and his biggest weakness, his kicking, has hardly improved.
QPR's struggles continue, then, while Middlesbrough's promotion push receives another welcome boost. There wasn't much between the two sides, of course, except one spot kick. But those fine margins often end up making a huge difference.
Here's how QPR fans reacted on Twitter to Green's performance against Middlesbrough, no doubt expressing their frustration with the result as a whole on social media:
looking like a very shortsighted decision now not making McCarthy our no1 keeper & keeping at #QPR Green is looking worse each week imo— mick (@qprmicky) November 21, 2015
I knew Rob Green would not save that pen. Not his fault, but when was the last time we have had a keeper that could do that? #QPR— Bill Simpson (@crickbar) November 20, 2015
We make one save in that entire game and it wasn't even from Green..#QPR— Billy Boy (@BillyMaguire7) November 20, 2015
people rave about Rob Green!!! Why?! Awful goalkeeper #qpr— TheListener78 (@TheListener78) November 20, 2015
Why does Rob Green in every game let a pass bakc role to far across is body, his only option is then to kick it out?!?!? #QPR— Darren Truswell (@DarrenTruswell) November 20, 2015