Liverpool and Manchester United have spent much of the transfer window insisting that Luis Suarez and Wayne Rooney are not for sale amid interest from Arsenal and Chelsea respectively.

Tottenham, meanwhile, are reportedly holding out for a world-record fee for prolific winger Gareth Bale, with Real Madrid having made the Welshman their prime target.

And Pardew believes those clubs' reluctance to allow their best players to leave has provided a boost for their Premier League rivals' chances of doing the same.

"It has been an important stance this summer by some owners to stand up against player power, against some players who obviously want to move on," he told the Daily Express.

"The owners have been strong - and that has been an important message to everyone. We need to make sure that if players move on, it is right for the club.

"This started a while back. Daniel Levy was very strong for his club when Modric moved to Real Madrid. This summer, the owners have been strong at Liverpool, at Tottenham again and at Manchester United.

"That’s not to say that some of these transfers won’t happen. They may well do. But it has to be what is best for the club - and those decisions have to be made by the manager and the owner."