The Spaniard missed a couple of opportunities, including a sitter five minutes from time, in the 1-0 loss to Corinthians in the FIFA Club World Cup final on Sunday.
"(We have to) Try to find the positives in the situation," Benitez said.
"He was there. He had the chances. He scored the goal that was disallowed.
"He has to take these chances in a final because it's not easy to create too many. If you have two or three, you have to score."