Agger was 22-years-old when he got 'man-handled' by Drogba at the Bridge mind.
Show me a defender, whom at that tender age playing against world class strikers, never experinced difficulties now and then. He should never be judged upon that one game where he got ripped a new arse nor the one where he kept Drogba quiet.
The only thing you can take from those two matches is that he's a quick learner.
Anyways if Skrtl plays come Sunday, which he probably is, it's not his man-marking of Drogba I'm concerned about, it's more his overall positioning and general understanding with Carra. And their completely lack of confidence in eachother.