Klopp's team are the only side in the league who have made a flawless start to the 2018/2019 season.
"So for us I think it's a bit early", Sarri added. "He can be a very good centre-back and a holding midfielder and he has taken his chance".
Chelsea hogged the ball in the first half but West Ham were unsafe when they were able to break out, Michail Antonio proving a real handful.
After a cagey opening spell, Chelsea established control but the home side could have taken a lead against the run of play just before the half hour. "West Ham is a good team", Sarri said after the game.
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Despite spending much of the first half under pressure, West Ham actually crafted the better chances, but Michail Antonio - starting in place of the injured Marko Arnautovic - squandered two presentable opportunities.
As the sun came out at the London Stadium, Chelsea again established control and almost took the lead when N'Golo Kante headed wide.
Alexandre Lacazette and Pierre-Emerick Aubameyang scored goals within three minutes of each other early in the second half at Emirates Stadium.
The match starts at 13:30 on 23 September 2018.
Eden Hazard, Willian and Olivier Giroud were left frustrated and it was substitute Alvaro Morata who came closest to scoring, but the Spaniard was denied by Lukasz Fabianski from close range. Everton has won only one of its six league games, losing the last two.
It would probably be slightly misguided for West Ham to go all out attack, but hopefully they'll commit men forward when they get the chance, and that should make for a decent game.