Sky Sports takes a look at where West Ham may need to strengthen during the summer.

West Ham manager Sam Allardyce must assess if his squad will be strong enough to survive in the Premier League

GOALKEEPERS

DEFENCE

MIDFIELD

ATTACK

VERDICT

West Ham secured promotion to the Premier League on Saturday afternoon with a 2-1 victory over Blackpool in the play-off final at Wembley. Here,takes a look at their promotion-winning squad and assesses where they will need to strengthen in the summer.Manager Sam Allardyce's first task must be to persuade Rob Green to sign a new contract. The 32-year-old's current deal runs out in the summer and he is understood to fancy playing abroad at some stage, but having returned to the England squad another crack at the top flight may tempt him to stay. Stephen Henderson's arrival from Portsmouth has solved a dearth of quality back-up which at one point saw midfielder Henri Lansbury end up in goal.James Tomkins is developing into a fine centre-half but he will need a commanding presence alongside him. Abdoulaye Faye has at times provided that this term but squeezing another Premier League season out of the 34-year-old will be a big ask, while New Zealander Winston Reid struggled in the top flight last time around. A left-back will be required if loanee George McCartney goes back to Sunderland but Ivory Coast international Guy Demel can make the right-back slot his own if he can stay fit.Any team would have missed Scott Parker but his early-season move to Tottenham allowed Mark Noble to step out of the England man's shadow and go on to be named the club's player of the year. The nous of skipper Kevin Nolan will again prove vital while Jack Collison and Gary O'Neil finished the campaign strongly after long-term injuries and, along with Matt Taylor, have plenty of top-flight experience. Rough diamond Ravel Morrison is also waiting in the wings following his January switch from Manchester United.Carlton Cole scored 15 goals but the rest of West Ham's strikers struggled to find the net with Freddie Piquionne, John Carew, Nicky Maynard and Sam Baldock managing just 12 between them. A top-quality frontman will therefore be top of Allardyce's summer shopping list. Winger Ricardo Vaz Te, their play-off final matchwinner, quickly became the Hammers' most potent attacking threat after joining from Barnsley in January and he looks capable of making the step up.No major overhaul for Allardyce this time around but keeping Green and bringing in a centre-half and a striker are musts if the Hammers are to avoid a season of struggle.