The defender was awful against Southampton, while his rivals for a centre-back place have looked superb in recent weeks.
What a shame it is to see Martin Skrtel struggling so badly at Anfield.
The Liverpool centre-back wasn't match fit when he came on against Southampton, sure, but that wasn't exactly an excuse for being at fault for three goals, tackling his own team-mate in the build-up to the winner - and conceding a penalty.
Doubts have grown over Skrtel's ability in recent months and Mamadou Sakho & Dejan Lovren have looked superb by comparison.
It's ironic that two defenders who struggled badly at times under Brendan Rodgers look a class above under Jurgen Klopp.
And the problem that creates for Skrtel is the big question of his Liverpool future. Right now, he is simply nowhere near good enough to even be on the subs' bench at Anfield. When has a substitute been so bad as to cost their team the game from 2-0 up?
With Joel Matip arriving on Merseyside in the summer, meanwhile, Skrtel will at least be fourth choice if he carries on at this rate.
It could be fifth if Kolo Toure stays...
So is the Slovakian's future now becoming a no brainer for Klopp? In other words, was Skrtel so bad today that there is no way forward for him at Liverpool?
He was a hero during the 5-1 win against Arsenal two seasons ago but it may be that Skrtel has been living off those headed goals ever since. Defensively, he is woeful right now. Can he turn it around or should the Reds move him on?