Melbourne: Roger Federer's struggles in 2013 are unlikely to hasten his exit from the game and the Swiss master could hit back and win next year's Australian Open, according to tennis great Rod Laver. The 75-year-old Laver, the only player to win the calendar grand slam twice, suggested Federer's lean period was more akin to a drop-off in form rather than a symptom of terminal decline. It's a tough time. He's 32 and not playing his best tennis by any means, Laver told reporters at Melbourne Park, where he launched his autobiography Rod Laver - A memoir on Thursday. It's sometimes hard to analyse someone of that ability. But once in a while it happened to me where for no reason... you're just flat. What's happened? What is it that made you play your best tennis?