The Blues head to Romania for the Europa League Round of 16 first leg and Benitez is determined to record a positive result rather than think about the FA Cup quarter-final showdown at Old Trafford on Sunday.
"We will try to progress in every competition and the next game is the most important game," Benitez said.
"Now we are here, to play in the Europa League, we will try to win.
"We know that all the competitions are important and if we can finish in the top four, everybody will be happy.
"After we will think about United, but the main thing for us is to progress in this competition.
"As a manager you have to think about both (matches), but the priority is this one."