West Ham completed a wealth of transfer business over the summer.
Sullivan said: “Every single one of the main signings have made a contribution and over the season we will need them all.”
This statement is an obvious one, but it highlights just how good West Ham’s transfer business was over the summer.
The likes of Pedro Obiang, Angelo Ogbonna, Dimitri Payet, Carl Jenkinson, Manuel Lanzini and Victor Moses have all had noticeable impacts upon the field of play, having all arrived as key summer signings.
Other players to head to the Boleyn Ground included Alex Song, Michail Antonio and Nikica Jelavic, and whilst only the latter pair have featured for the first-team, all three are sure to grow in prominence as the season progresses.
Few clubs ever succeed in the transfer window as much as the Hammers did over the summer, and the East London club's management truly outdid themselves.
Slaven Bilic was appointed head coach and handed a fantastic squad for the start of the campaign, and he is so far working wonders with the side, as the Hammers sit in the Premier League top four after nine games.