Mitrovic did not start a Premier League game for Newcastle this season before Benitez sent him out on loan to Fulham on deadline day last month.
“My target is of course to score as many as I can, but first my target is to try help the team every day.
“Of course I wish Newcastle all the best, I hope they will stay in the league, they deserve it because they have a good team, good fans and a good manager.
“I hope they will stay in the league and in the summer we will see what happens but I'm happy here, focused here and looking forward to playing every game.
“My only target is to help Fulham to get promoted."