The goalkeeper's burgeoning reputation was enhanced at Euro 2008 and has recently been linked with moves to AC Milan, Arsenal and Aston Villa.

And Hoek feels that Boruc can only be regarded as one of the best in the world if he makes the move to one of Europe's big leagues.

"In terms of ability Artur deserves to be spoken about in the same breath as the likes of Spain's Iker Casillas or Holland's Edwin van der Sar, who I worked with for years at Ajax.

"All great goalkeepers are categorised by the fact they don't make errors when it counts, when the pressure is intense â€" and Boruc falls into that category.

"An average team with a great keeper will achieve more than they deserve, while a great team with an average keeper will lose matches they deserve to win.

"During Euro 2008, Artur didn't make mistakes. Now people rate him as world class. But, in order to really be considered among the best, you must prove yourself every week against top opposition in Spain, England, Italy or Germany.

"It would be fantastic for Artur to be competing at that level regularly and that's the challenge he needs. It's the challenge every great player needs.

"If I was in his skin, I would be looking for the next challenge."