West Ham United have tabled bids for three strikers, as Joint-Chairman David Sullivan continues the pursuit of a prolific forward to provide more firepower for his side.

With Andy Carroll sidelined for four months due to an ankle injury, Mr Sullivan's focus has been on signing another striker to provide manager Sam Allardyce with more options.

The Hammers have already added six new faces to their squad, with a raft of hungry, young players joining the Club this summer, and Mr Sullivan is hopeful that the chase for the final piece of the jigsaw could soon bear fruit.

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He exclusively told whufc.com: "We've got offers in for three or four strikers - one in England, three abroad - and we just hope to land one of them. We do need to sign another player.

"We have worked 24/7 all summer and we still want to get at least one more striker in. It's been very, very tough but we're pleased with what we've got - there are players with massive potential for the future but we know there isn't enough goals in the team at the moment."

The targeted new arrival will join Enner Valencia and Mauro Zarate in supplementing the Hammers' frontline in 2014/15 and Mr Sullivan believes both will have a positive impact in east London.

He continued: "The player we've spent the most money on, Enner Valencia, is our big summer signing and he is about two or three weeks away from being able to play, because he was at the World Cup.

"He's now in full training but I think the earliest he'll play is in the Capital One Cup match, so it'll be exciting for people to see him make his debut in that match.

"We were looking at Enner from before the World Cup, when Ecuador played Australia at Crystal Palace and he was the leading goalscorer in Mexico.

"Goalscorers are goalscorers and his goals per game for Ecuador since he's been playing centre forward is very high. He scored more goals at the World Cup than the England football team, he was in the top ten goalscorers of the tournament, even though his team got eliminated at the second stage, so he's a player with potential.

"He might be in the top five scorers in the Premier League next season, he might take time to adjust, you just don't know with foreign players, but potentially he's a top, top player.

"If Zarate gets the supply he will score goals. He probably needs to play off a big centre forward but at least we now have a plan B. If we're losing in a game we have someone who can go on and change things."

Enner Valencia

The Hammers also signed two young English players of real potential in Aaron Cresswell and Diego Poyet and Mr Sullivan is excited by both.

He added: "Poyet could be a world-class player within 12 or 18 months. Whether he's ready now or needs six months, I don't know. People at Charlton tell me he's their best young player in the history of Charlton.

"Cresswell is the left-back of the season in the Championship and may need time to adjust to the Premier League, but you don't know. Potentially they are both very good players. We needed some younger legs in the side and that's what we've tried to bring in."

Taking the pre-season as a whole, Mr Sullivan would have hoped for a smoother ride but believes the Hammers can overcome the obstacles laid in their path to make a positive start of the campaign.

He said: "The pre-season hasn't gone quite as planned - the worst thing is that we picked up injuries and in particular Andy Carroll, who is out for four months and makes a huge difference to us.

"We've got to overcome these things and if you look at the history of football, often people with a good pre-season have a terrible season, and people who have a bad pre-season have a good season.

"I'm hoping on Saturday that we may see a little taste of what we're going to see against Tottenham, but Tottenham is the key game. We want to make it four in a row, but they're about even money with the bookies and we're about 2/1 to win, so we're not the favourites. If the crowd can get behind the team it really does make a huge difference. We just need a little bit of luck on the day.

"Like everybody we're looking forward to the season with a little bit of nervousness. It's what happens in those first three or four league games that matters, not what happens in pre-season."