Clemence says the Spanish World Cup winner does not look the same player who set Anfield alight when he first arrived in 2007.
"When somebody starts playing below par, particularly somebody who is so important for Liverpool, then questions will be asked," England goalkeeping coach Clemence told talkSPORT.
"Even in the World Cup, he was nothing like the player he had been for Liverpool the previous season. There was some sort of knee problem, but that has supposedly cleared up now.
"He scored two goals for Spain last week, but certainly yesterday he looked a shadow of his former self and Jamie Redknapp was very critical of him, possibly a little over-critical in my mind.
"But, having said that, Fernando Torres has set himself a level of performance now which obviously he's not performing at."