The Frenchman said the club had reached an agreement which will see the 22-year-old move to London from Legia Warsaw.

"That will be done," said Wenger. "He will be our new goalkeeper. He will join us next year, be in the squad and compete for a position.

"He is one for the future. We have identified him as having all the qualities to challenge here and be one of the future great goalkeepers for Arsenal Football Club."

The capture of Fabianski comes in the wake of Lehmann's recent decision to accept a one-year contract extension, the 37-year-old having failed to persuade the club to offer him a longer deal.

Arsenal, who had been linked with a move for Scotland number one Craig Gordon, also have Spanish goalkeeper Manuel Almunia on their books.