The Liverpool centre-half endured a forgettable second-half cameo at St Mary’s on Sunday as the Reds squandered a 2-0 lead to lose 3-2 to Southampton.
Klopp’s side were coasting in the first half and surged into a 2-0 half-time lead before Skrtel replaced Dejan Lovren before the start of the second half.
The Slovakia international conceded a penalty within minutes of his return from a hamstring injury but Sadio Mane was denied by Liverpool goalkeeper Simon Mignolet.
However, Skrtel played a part in all three of Southampton’s subsequent goals as Liverpool slipped behind the Saints in the race for a top-four finish.
Former Liverpool striker Aldridge believes Klopp will have a big decision to make on the 31-year-old’s future in the summer ahead of the arrival of Joel Matip.
“The second half display against Southampton showed once again that Jurgen Klopp will have big decisions to make at Liverpool in the summer,” Aldridge wrote in his Liverpool Echo column.
“He’s already brought one centre half in in the shape of Joel Matip and there will be some people expecting to see another.
“In truth Martin Skrtel has struggled for a while, we haven’t seen the best of him for some time.
“Against Watford, he got bullied, got injured and left the pitch. He’s been out for a long time since then.
“Since then he’s only had time with the U21s, where of course he got sent off in the week against West Ham. On Sunday they’ve scored three after he’s come on and he’s been involved in some of the goals and given away a penalty.”
Liverpool have conceded six goals in the last two Premier League games which Skrtel has played in.
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