Leeds have agreed a deal with Sampdoria for the young midfielder, who looks set to move to the Italian side today.
Vieira had been happy to stay with Leeds, but Marcelo Bielsa’s side have reportedly decided that he is an expendable player.
Vieira did not feature regularly in pre-season, and appeared to be knocked down the pecking order by Mateusz Klich’s excellent showings since his return to Elland Road.
The prospect had been regarded as Leeds’ brightest young talent, but Marcelo Bielsa reportedly feels that they are other options on the table for him.
Leeds now look set to sell Vieira, who will earn double his current salary when he puts pen to paper at Sampdoria.
Leeds have started to spend this summer, following the additions of Patrick Bamford and Barry Douglas, and they will recoup some of their outlet, with Vieira’s sale set to land them around £7 million.