Some of the things printed about this transfer, like shady dealing - there's just no truth in it West Ham boss Alan Pardew

The 22-year-old World Cup stars were officially unveiled at Upton Park on Tuesday after joining on undisclosed terms on transfer deadline day.

Pardew said: "With the club admitting exploratory takeover talks as well it's all intriguing - it is to me too.

"But I don't care what people are saying. I've got two world-class players at West Ham - let's rejoice."

News conference: West Ham boss Alan Pardew

Much has been written about the deal that took striker Tevez and midfielder Mascherano to West Ham as several other clubs were rumoured to be interested in them.

Media Sports Investments owned the rights to the players when they played for Brazilian side Corinthians and MSI have been linked to a takeover of West Ham.

On Friday the club revealed they were having "exploratory discussions" over a possible takeover.

But Pardew added: "A lot of the press has been negative, people don't like change.

"But the transfer system is changing rapidly. Transfers across the board and the role of agencies in terms of buying players is changing.

"But some of the things printed about this one, like shady dealing - there is just no truth in it, as far as I'm concerned.

"These two guys are on the world stage and they have come to us in a manner that is undisclosed.

We haven't come to save anyone. We come into a big team with great spirit Javier Mascherano Other clubs being interested is a different story, we don't want to talk about that Carlos Tevez

"But I can't worry about that, I'm the team manager. I've put the terms of the deal to the back of my mind."

Pardew says he expects Tevez and Mascherano to help West Ham compete with the Premiership's big guns during the time they are at the club.

"I just want to work with them," said Pardew.

"They have signed four-year contracts, people have forgotten that already, and I can assure you they will not be leaving in the next transfer window.

"We want to challenge the biggest clubs in our division and this deal is going to help us do that.

"But I will never be forced to play either of them - as has also been suggested. If that was the case I wouldn't be here anymore."

Mascherano said he had wanted to join West Ham because they had showed so much interest in signing him.

"We were both very happy to receive the offer from West Ham," he revealed.

"The fact that they made us a firm offer was encouraging and you always go to the place where you are most wanted.

"I didn't think it would be a controversial move. We had other offers in the pipeline but nothing ever came of them.

Pardew holds court, flanked by Tevez (left) and Mascherano

"The Premiership is an important league to play in, especially for us - coming from South America.

"But we haven't come to save anyone. We are both team players and we come into a big team with great spirit and will work hard for the team."

Tevez added: "We both wanted to play in the Premiership, which is one of the biggest leagues in the world, and that is why we are at West Ham.

"Other clubs being interested is a different story, we don't want to talk about that at the moment. They showed a lot of interest in us and that's why we are here."

Mascherano had previously revealed he would have been reluctant to join Manchester United after speaking to former Red Devils player Juan Sebastian Veron.

United said on Sunday they had rejected the chance to sign him and Tevez.

Mascherano said: "I have spoken with Veron and he told me United manager Sir Alex Ferguson does not have much belief in Argentine players, so I was reluctant.

"I know Argentina defender Gabriel Heinze is there but Veron has some different stories."

Tevez and Mascherano were linked with some of the biggest clubs in Europe over the summer before eventually moving to West Ham.