"Jack has done very well since he started training with the first team about six weeks ago and he wouldn't let anyone down if he played against Cardiff or anyone else," senior teammate Jamie Carragher told liverpoolfc.tv.
"You never really know what a player is going to be like until he has been given a chance and been tested at the top level but Jack should be confident because he is a good player - now he just has to go and prove it.
"It would be a good experience for Jack to come up against the likes of Robbie (Fowler) and (Jimmy Floyd) Hasselbaink because they are both strikers with lots of experience and as a young defender you will learn loads of lessons from them.
"He is a big, strong lad who is good in the air but he can also play a bit because I know he's been playing in midfield for the reserves. I'm sure if he's selected he will do well."