According to Spanish sports daily AS, Besiktas have made Beto a significant offer in an attempt lure the 32-year-old to Turkey, putting his contract renewal with the club in serious jeopardy.
Several weeks ago, Sevilla president Jose Castro revealed that negotiations with Beto over a contract extension were "on track" as the club wished to keep the 'keeper and wrap up the deal before his contract expires this summer.
However, Besiktas' offer is being blamed for the talks between Sevilla and Beto coming to a standstill, as the player may see fit to make the move to Turkey.
Beto is currently recovering from injury, but upon full fitness, Unai Emery will have the difficult task on who will start between the sticks, after Sergio Rico has performed more than capably in Beto's absence.
Should Emery name Rico as the starter this weekend following Beto's full recovery, it is very likely he will indeed leave the club this summer, but will leave as the Portuguese national team starter and the Europa League champion.