29-year-old Fiziev knocked out the representative of Brazil in the last round.
The main fight of the UFC Vegas 58 lightweight tournament took place in Las Vegas.
On account of Fiziev 12 victories and one defeat.
Dos Anjos suffered the 14th defeat of his career with 31 wins.
Earlier, Alexander Grebnev was not sure that Said Nurmagomedov was able to break into the top 10 UFC bantamweight.