The Belgium international has been widely hailed as an astute signing since the 25-year-old completed a £9m switch from Sunderland in the summer transfer window.
On Sunday I was more concerned with how his back four left Mignolet exposed
However the Belgian No2 has conceded 16 goals in his last 10 top-flight outings – and Aldridge feels the Reds defenders aren’t doing enough to protect their goalkeeper.
“Simon Mignolet has made a few errors recently but he has been a really good buy for Liverpool,” Aldridge wrote in his Liverpool Echo column.
“Maybe that mistake against Man City has been playing on his mind a little bit but everyone is right behind him and I’m sure he will come through this period.
“The keeper should have done better with Stoke’s third goal, but overall on Sunday I was more concerned with how his back four left Mignolet exposed.
“Full-backs are there to stop crosses coming in but we allowed far too many balls to come into our box.
“And with these balls they use now, you can’t just allow someone to shoot from 25 yards because they fly in.”