De Gea was meant to make the move to Madrid, with Navas joining United. But the deal fell through in the last minute.
De Gea has since signed a new four-year-deal at Old Trafford and regained his position in the first eleven of the club.
Speaking to Canal Plus, Manchester United’s goalie, De Gea said:
“I am a guy who likes to put the bad things and difficult times behind me,”
“I had a lot of tough times and I know what it is. We must move forward, working equally and always strong.
“It’s a learning process that gives football hard moments but that make you mature and grow. These are things that you learn in the world of football. You have to keep working and try to improve in every training session.”
De Gea – on international duty as Spain prepare to host Luxembourg in Euro 2016 qualifying on Friday – added: “Everyone who works for Manchester respected me, I tried to help and I am very grateful to them.”