He has lost his centre-forward place to veteran Francesco Totti in the side since Montella's appointment, but Borriello insists all is well.
"If he was to be kept on as Coach for next season then I would be the first to be happy for him," he told Leggo.
"I believe in Montella and I speak to him often. I can feel the belief and admiration that he has for me.
"I know that it is hard to change the face of a side, but I am always ready to give my maximum."