“I think it is possible that it’s going to be and going to happen again.
“We saw it with Novak, myself and Rafa [Nadal] that we come extremely close, but doing it I think you need a bit of luck, you need personal strengths, you need everything and that’s why I think it’s going to be hard but it’s possible.
“We have to ask also Rod Laver what he thought because he was sitting first row watching Novak play, but what Novak did this year was truly exceptional.”
Although Djokovic and Federer remain level for now, the Serb holds the age advantage which makes it highly likely he will pull away as the all-time Grand Slam leader in the future.
