Diouf gave an interview to French sports daily L'Equipe in which he hit out at his former Anfield team-mate, who criticised him in his 2007 autobiography.
Gerrard wrote: "I wasn't Diouf's number one fan. Being around Melwood and Anfield I knew which players were hungry, which players had Liverpool at heart. Diouf was just interested in himself.
"His attitude was all wrong. I felt he wasn't really a***d about putting his body on the line to get Liverpool back at the top."
Diouf said: "What he said is only of interest to him.
"All I worried about was the Senegal team, I took them to the World Cup quarter-finals in 2002.
"I was in Pele's 100 players of the century. Not him.
"I respect him as a footballer, but there is nobody more egotistical than him.
"He does not care about others. I spoke to the major figures at Liverpool and nobody can stand him. And I am not talking about (Jamie) Carragher."