Emre Can (#23) conceded a first-half penalty against Chelsea
Can was at fault for Chelsea's opening goal when he bundled over Eden Hazard in the area with a clumsy challenge - leading to a penalty that Hazard converted.
Can also struggled alongside his two defensive team-mates as manager Brendan Rodgers again chose to play a three-man back line.
And Carragher said of Can on Sky Sports: "He's looked like a midfielder playing at the back tonight. He can't defend and he lacks pace."
Can, playing right-back against Chelsea, has started Liverpool's last five games and has been involved in their eight-match unbeaten streak that began in mid December.
The Reds were saved on the night by Raheem Sterling's second-half strike, meaning they take a 1-1 draw into the second leg at Stamford Bridge next week.
Mourinho and Rodgers preview League Cup clash [AMBIENT]
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