The 41-year-old has insisted that he has no intention of retiring because his mother Sue is still teaching physical education in the US at the age of 70.
"If you look at my dad and my mum, my dad Len has had a tough go of life when it comes to illness and injury but my mum has had nothing," London 24 quotes Friedel as saying.
"I don't feel any different. When I go in for my medicals at the club, it is a very thin piece of paper. My mum is still a physical education teacher and has no signs of wanting to stop.
"She is 70 and teaches at an inner-city school from kindergarten, five or six, up to 14-year-olds. She has to be quite fit, you wouldn't know she was 70, that's for certain."
Friedel could start in goal for tonight's Europa League second leg against Inter Milan in Italy.