The £75million-plus signing from Bayer Leverkusen started Chelsea’s 2-0 defeat to Liverpool on Sunday but played out wide.
And Carragher believes that’s not how the Blues will get the best out of the Germany international who scored 18 and assisted nine last season in a more central role.
“Looking at the game already, I think of last season and I think of Chelsea being a 4-3-3 team, with now and again Frank throwing a three-at-the-back team in,” said the former Liverpool defender on Sky Sports.
“Tactically in big games, he beat Jose Mourinho twice, he beat Pep Guardiola, I thought there were really good signs tactically from Frank and how he changed things. He went to 4-2-3-1 at Brighton – Havertz was on the right – today, he went with him as a false nine.
“He’s obviously a quality player, but I do look and I’m already thinking – even though we’re just two games in – where does Havertz play?
“He will play. But where does he fit into a 4-3-3. He almost looks like a number 10 and we don’t see them in football as much now.
“He’s either gonna have to be part of the front three from a wide position, or he’s gonna have to be part of the midfield three and be the attacking player.”
Havertz was taken off at half-time in the Liverpool clash with Lampard bringing on Fikayo Tomori to fill in the defensive gap caused by Andreas Christensen’s red card on the brink of half-time.
Chelsea went on to lose 2-0 with Sadio Mane scoring twice in four minutes early in the second half.