Hughes replaced Robert Green with the Brazilian in a controversial move.
He told the Fulham Chronicle: "I spoke to Rob this week and told him my intentions. It's difficult for him because we've put him in this situation that he didn't feel he would be put under.
"It wasn't pre-meditated. It wasn't a case of getting Rob in knowing we would bring Julio to the club. It progressed and we had the opportunity to bring in one of the best keepers in the world.
"Everyone saw by the manner of his performance today that it was the right decision to bring him to the team."