Federer has won a remarkable nine titles after making a comeback and his audacious achievement was regarded as the best comeback of the year.
Boris Becker is awaiting the return of Andy Murray, who he considers one of the best players in the world when fully fit.
Federer does not have any future records that he wishes to match and will take them as when they come his way.
The rivalry between Roger Federer and Rafael Nadal will always be considered as one of tennis' greatest-ever.
Rafael Nadal's injury problems have continued as he withdrew from the Mexican Open in Acapulco, giving Roger Federer a boost in the ATP tennis rankings.
The Serbian posts a video for him practising for the first time since elbow surgery - but with the same strapping he wore at the Australian Open.
The German feels the Dubai Duty Free Tennis Championships could be an opportunity for some players without the world number one involved.
Roger Federer is currently on a break after skipping the Dubai Tennis Championships. He will next return at the Indian Wells Masters beginning 8 March.
Roger Federer has won two Olympic medals – a silver in the singles at the London 2012 Games and gold in the men's doubles category at the 2008 Beijing Olympics.
While Roger Federer could replicate last year's performance, he is refusing to rule out the possibility of featuring during the clay-court season.
Federer had to miss the second half of the 2016 season due to a knee injury, but has returned to take over the top ranking in men's singles.
Zverev made his way to fourth in the ATP rankings earlier this year but has failed to translate his ascendancy on the courts.
Federer has started 2018 in the same way he did in 2017, winning the Australian Open for the sixth time in his career.
Feliciano Lopez will be the world number two's first opponent since he withdrew from the Australian Open.
Robin Haase lost to Roger Federer in a three-set quarter-final match at the Rotterdam Open, being the only player at the event to win a set against the Swiss legend.