Sunderland AFC have completed the signing of Boavista goalkeeper Michael Simões Domingues (Mika).

The 25-year-old joins the Black Cats on a permanent deal, having signed a two-year contract at the Stadium of Light. He becomes the tenth new arrival under manager David Moyes.

The deal has been ratified by FIFA, after Sunderland completed all of the necessary protocols in advance of the transfer window closing. A technical issue meant that Boavista were unable to complete their requirements by the 11pm deadline on August 31, however FIFA are satisfied that both teams fulfilled their commitments and the transfer has now been approved.

Domingues arrives on Wearside after spending the last two seasons with the Primeira Liga side, having previously played for Benfica and Atletico CP.

On the international stage, the 6’1” Portuguese stopper has represented his country at U20 and U21 level.