David Sullivan wants ex-Nottingham Forest winger Michail Antonio to be as successful as the player they bought from Ipswich Town last summer.
The Hammers signed Cresswell a year ago from Ipswich Town, and he went onto establish himself as one of the best left-backs in the Premier League.
Only strong competition from the likes of Leighton Baines, Luke Shaw, Kieran Gibbs, Danny Rose and Ryan Bertrand has kept him out of the England squad, but if he kicks on this season then a Euro 2016 place is not out the question.
Sullivan believes Antonio can be a key player for the club, and will be able to make the step up from the Championship with similar ease.
He told West Ham's official website: "We have paid a sizeable fee for Michail and believe he could become a star player for the club over the next few years.
"He has got pace and power and his stats show he has an eye for goal with an impressive record wherever he has played. We hope like Aaron Cresswell, he can make an immediate impression in the top flight and repeat the form which saw him attract interest from a number of clubs in this window."
Antonio is no guarantee to pan out as a success, but there is no reason to discount him either just because he came from the Championship. In fact this arguably makes him better suited to hit the ground running for his new club than had the Hammers signed a winger from a foreign league for a similar price.