The Reds endured their third consecutive defeat across all competitions, falling 2-1 to the Blues at Stamford Bridge on Saturday.
Former Bournemouth star Kerkez started in Arne Slot’s lineup but was substituted in the 55th minute.
"The boy Kerkez, to be honest with you, at this point in time, he looks like a youth-team player. I know he’s a good player, but he looks like he’s playing for the youth team, or the Under-21s,” he sad on Gary Neville Podcast.
"He looks so naive; he looks like a baby out there. He’s losing 50-50s with Neto! He’s had Premier League experience; it’s not like he’s come in from another country.
"He’s got a lot of games under his belt, he’s played at these grounds before, so I expected him to slot in. One, he’s playing alongside Virgil Van Dijk, the best centre half in the world, so if you want to play in a back four, you want to play with great defenders and he is doing.
"And he’s got players who work hard on that side, it’s not like he’s playing on the right with Salah in front of him, which is always a bit more difficult because you always get a little bit more exposed.
"But I have to say from the first ten minutes of that game against Bournemouth on the first game of the season, he’s struggled."