Mignolet is undoubtedly a superb shot stopper but his glaring errors from crosses and set-pieces have become all too abundant. For three key set-pieces, the Belgian was at fault. He was saved with one - Jonas Olsson was ruled out for offside - but Liverpool were punished with goals on the other two occasions.
Since Milner made his summer switch to Anfield, many have raved about his work rate, energy levels and what he offers the team in an abstract kind of way.
But, at the end of the day, football isn't about the abstract. It's about results and definitive contributions. Away from the penalty spot, Milner has made few definitive contributions this season and, against West Brom, he once again offered little of note.
Watch the highlights and Milner is barely involved. The Reds midfielder needs to start doing more than just running around and being praised for his engine. Jordan Henderson has a better engine - and was involved in both goals against the Baggies, scoring one of them. And he isn't yet fully match sharp...
All credit to Divock Origi, who has been widely criticised since joining Liverpool but has come on leaps and bounds under Jurgen Klopp. He was brought on to change the game against West Brom and that's what he did, netting a late equaliser.
Benteke, however, didn't offer anywhere near as much, despite playing far more minutes.
Every appearance the Belgian makes for the Reds seems to produce less and less these days - could he be this year's Mario Balotelli, just with a couple more goals to his name?