Molby wrote in the Liverpool Echo: "When you kick off the season with three successive clean sheets, it's a little bit surprising to see two centre-backs added to the squad on transfer deadline day.
"Given the size of his transfer fee Sakho has clearly been bought with the first team in mind.
"Not many clubs spend £15m on a substitute defender.
"Quite where that leaves Skrtel we'll have to wait and see."
For the big stories and the banter follow us on Twitter: @tribalfootball