Roger Federer is arguably the greatest player to suit up in the sport of tennis and has had a remarkable run so far in his career. But despite the accomplishments and accolades, the Swiss Maestro believes he can still improve his game, and that’s something to marvel at, according to tennis expert Brad Gilbert.

"First and foremost, if you don't think you can [improve], you won't. By the usual standard, Roger had a remarkable year, but what's really amazing is that this is a guy who really thinks he can still get better,” Gilbert said via an ESPN article.

“He's never satisfied with the status quo, and right now he has to think about what he can do to beat Djokovic in a five-set match. A hire like this is going to make Roger believe he can do that again. He's going to look at things in a fresh way."

Gilbert, who is an American tennis coach who has handled the careers of the likes of Andre Agassi, Andy Roddick, Andy Murray Alex Bogdanovic, Sam Querrey and Kei Nishikori, is referring to Federer’s decision to hire Ivan Ljubicic as his coach and that such a move will be good for Federer at this point of his career.

Federer, who has won 17 Grand Slam titles, the all-time highest record in men’s singles in the history of the sport, let go of previous coach Stefan Edberg after tapping Ljubicic as his new mentor.

Federer has had a successful 2015 ATP season but has come up short in adding to his record haul of majors championships. Particularly, the former World No. 1 has struggled in the big games against current top player Novak Djokovic of Serbia.

Federer came close to winning his 18th Grand Slam title twice, losing to Djokovic in the finals of the 2015 US Open, 4–6 7–5 4–6 4–6 and also the championship round of the 2015 Wimbledon Championships, 6–7(1) 7–6(10) 4–6 3–6.

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