Chelsea are expected to enter the transfer market for a marquee goalkeeper at the end of the campaign.
Robert Sanchez has been the Blues' first-choice between the sticks, but he has been error-prone on several occasions.
The club have not contemplated a change over the past year, but that is expected to happen later this summer.
It is claimed that Sunderland shot-stopper Robin Roefs is high on the club's shortlist to become the number one.
The Black Cats only signed the Dutchman last summer for £12m, and he has been key to their fantastic league run.
Roefs had made several vital saves throughout the season, and he could pursue a bigger challenge this summer.
Sunderland are unlikely to block his departure to an elite club, but they won't entertain less than £50 million.
Hence, Chelsea will have to spend a premium fee to land the highly-rated shot-stopper from the Wearside outfit.
Tottenham Hotspur have also been linked with his services.