Navas has only played 11 matches in all competitions this term, and has been forced to be content with being second fiddle to Madrid captain Iker Casillas.
"If I don't play, I can't prove my worth," Navas, who caught everyone's attention with his sensational performance during last year's World Cup, told reporters. "Just because I don't complain to the press doesn't mean that I'm not struggling. I wanted to play more. I never thought about being a back-up.
"It's true that I've had a difficult year, but I've always tried to do my best and be professional. When I played, I tried to do my best. My attitude and desire have helped me cope."
Should Madrid sign Manchester United goalkeeper David de Gea this summer, Navas is likely to feature even less. Despite the threat of de Gea joining Los Blancos, the 28-year-old is confident that he has what it takes to be included in the starting line-up.
"I hope next year will be different and that I earn a starting role," he said. "I have a contract for five years and have a positive mindset.
"It's difficult, but I won't give up. I hope the opportunity arises at some point. Competition is good because it helps me improve."