Assistant manager Neil McDonald has promised West Ham will go for the jugular as they bid to make the npower Championship play-off final.
The Hammers missed out on automatic promotion to Southampton on the final day of the season but have responded superbly, winning the first leg of their semi-final 2-0 at Cardiff on Thursday.
West Ham head into Monday's second leg at Upton Park clear favourites to reach Wembley as a result, despite City boss Malky Mackay suggesting the two-goal cushion is a "dangerous score" for the east Londoners.
McDonald dismissed such talk when asked about the comments today, saying: "I think he is in a more dangerous position because if we score the third goal then the game is over.
"It is a good danger to be in, being 2-0 up. We will try and get the third goal.
"If you get the third goal, nine times out of 10 you would say that the game is over so it is in our hands.
"We have to play off the front foot and try and get the third goal to kill the game off as quickly as we can.
"It is vital and, looking at the negative side, if Cardiff then scored, they still need two to draw.
"We can afford to make two mistakes to a certain extent (if we score that goal) but they certainly can't afford to make one in the whole of the game."
West Ham have no fresh injury concerns heading into the match and look likely to start Jack Collison once more.
The Wales international has fought off a persistent knee injury to play a key role in the Hammers' battle for promotion to the Barclays Premier League and netted both goals at the Cardiff City Stadium.
"It is amazing, you have lucky grounds and he seems to play well when he goes back to Wales," McDonald said of Collison.
"To get the two goals finished off a fantastic performance for him and it's always nice when you're a Welsh international to go back and score a couple of goals, so he is on a high.
"He has to be man-managed (with his injury problems) but he has come through a lot of games so I congratulate the medical and sport science staff.
"Congratulations to him as well because you have to do the hard work to do the rehab on your injury.
"He has done that, he stuck to the programme and that is what has made him play the majority of the games."