England completed their final preparations for their Pool B opener with an intense training session and then a light run at the Otago Stadium - and now they are raring to go.
Haskell vows England will fight fire with fire against the Pumas and insists his side are desperate for glory.
He said: "The guys are ready to play.
"We've had eight or nine weeks together, guys have been left by the wayside, there's been competition, there's been physicality, there's been ups and downs and it's just about getting that on the field and letting all that emotion come out.
"You can feel guys are desperate. With a World Cup like this there's a little bit of fear, there's a lot of expectation.
"And when people come to New Zealand where the whole place is rugby mad you want to make sure you perform.
"We all know it's very important to get a good result on the board to start with. We are in at the deep end against Argentina, our group is very tough.
"The talking stops. It's a World Cup. It's do or die."
The focus of every England-Argentina clash is on the scrum, with the Pumas boasting one of the most revered packs in the global game.
England learned the consequences of losing the physical battle in their defeats last season to South Africa and Ireland and are steeling themselves for a brutal encounter.
"I've played with a number of their forwards at Stade Francais, Rodrigo Roncero, Juan Leguizamon," Haskell continued.
"If you come to a World Cup and you are not ready for the physical challenge, there's no point being here.
"We know what Argentina is about, they are very passionate but so are we.
"Sometimes they are more expressive, whereas the Anglo-Saxon mentality is a bit more closed, not so outwardly passionate.
"But we pride ourselves on our passion as an English team.
"If you look at the team around us, every time I come out I feel privileged to be with the guys in an England shirt because there's so much talent."
Haskell will start opposite Leguizamon at openside flanker with Nick Easter back at number eight, having missed England's final World Cup warm-up win against Ireland with a calf injury.
England's only other change is on the wing, where Delon Armitage starts ahead of Mark Cueto while scrum-half Ben Youngs will return to action from the bench after recovering from a knee injury.
Mike Tindall, a veteran of England's 2003 World Cup triumph, captains the team in the continued absence of Lewis Moody.
"We just want to get going now," said manager Martin Johnson.
"There are enough re-runs on the TV, what-ifs and speculation. Let's get the games going now.
"Last night we went down to Carisbrook in the pouring rain and it was one of the most error-free sessions I have seen in a long time, in terrible conditions.
"That was a sign of the focus and mentality they - and they need to carry that through to the game."
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.