Sebastian Haller has already scored three goals in his first three games for West Ham United.
Haller has scored three goals in as many Premier League appearances for the Hammers since arriving in England.
The French striker’s brilliant form has excited everyone at West Ham, as he looks as if he could be a huge weapon.
But Pellegrini does not believe that West Ham have even seen the best of Haller yet.
He said: “I think that Sebastien will improve a lot. It is not easy to know the Premier League. He needs some time to adapt to Premier League defenders.”
If Haller does get even better as Pellegrini has predicted then he could turn out to be one of the best signings of the summer.
The powerful forward is already causing side’s plenty of problems, so if he does have the ability to play even better than that is a frightening prospect.
West Ham have made a very bright start to the campaign, with optimism rising about how well they could do this term.
The Hammers are unbeaten since losing heavily to Manchester City on opening day, and currently sit in seventh place in the Premier League table.
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