West Ham United co-chairman David Sullivan is backing any potential summer arrival at the club to have the same impact as the likes of Dimitri Payet, Manuel Lanzini and Cheikhou Kouyate.

The Hammers have already signed midfielder Havard Nordtveit on a free transfer from Borussia Monchengladbach and are currently looking for more potential acquisitions in the transfer market.

Sullivan believes whoever the East Londoners bring in this summer will certainly add plenty to Slaven Bilic's squad, as previous signings have done over the past couple of seasons.

"We have done that exceptionally well in recent years, with the likes of Winston Reid, Cheikhou Kouyate, Aaron Cresswell, Dimitri Payet and Manuel Lanzini vindicating this approach," Sullivan told club's official website.

"All of those players have gone on to become stars of our team and you can rest assured that we will be bringing players in this summer who will prove to be just as influential."