QPR are bottom of the table with only two points from seven matches.
They have yet to pick up a league win this term despite continuing to rebuild the team this summer under Hughes in signing a host of new faces including Julio Cesar, Jose Bosingwa, Park Ji-Sung, Ryan Nelsen, Fabio, Esteban Granero, Junior Hoilett, Andrew Johnson and Stephane M'Bia.
"For all QPR fans. Fans who analyse properly. I am not changing anything," said Fernandes on Twitter.
"And all shareholders agree. No team except the first game has outplayed us. We need a consistent 4 defenders not changing every week esp left and right back. Mark is the right man."