Benitez made the comments after crashing out of the Champions League last night.
Benitez is now hoping to bounce back in the Merseyside derby against Everton at the weekend.
“We had to do our job today. Our job was to win and we won but we couldn’t control the other game,” he told Sky Sports.
“To win today was the only thing we could do and we played well, with four or five clear chances.
“The main thing is to be ready for the next match, we have an important game on Sunday.”
“I am 100 per cent sure we will finish in the top four. The team will play well when all the players are available so I am sure we will finish in the top four.”