Coutinho's wasn't given as he still managed to get a shot away when in a goal scoring position. It was actually a good bit of reffing and is different from a similar thing happening in the middle of the pitch as Klopp referred to as it's highly unlikely that it would deny a goal scoring opportunity.

The Voice of Reason In An Otherwise Mediocre World

The referee should have pulled it back for the penalty when it was blocked a second later. Full kudos to Coutinho staying on his feet, but had he not tripped there is no way that was getting blocked. Had Coutinho gone down like most players do in that situation, he would certainly have got the penalty (and likely a card for Kelly).

As I said, I'm happy to accept the non-red and that not being a penalty.

"One Nation Under God, has turned into One Nation Under the Influence of One Drug"
[Link]

Have you not been listening to Willo? There's no such thing as gross incompetence from the referee.

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The Ferret
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I agree it was a penalty and should have been pulled back, but Cabaye should have had a penalty in the second half too. It was not as obvious from the camera angle but did anyone else spot that he was fouled by Milner, who raked his ankle, before he blazed over the bar, from Benteke's over head kick.

The cellophane illusion of a starry sky / Stretched over an open sore.
Big Nothing

The look on Grujic's face after was enough to merit the Red Card. Career-wise that kind of foul is worse than any elbow to the chops.

Nothing really is made of it from our end, all we hear though are the sounds of Scouse discontent, and the media lap it up and echo it round to pander to the victim culture that has been nurtured for decades.

Tomkins left the ground on crutches wearing a protective boot. The ankle is swollen and he is a doubt for the next two games.