Serb, who had to leave his hometown of Belgrade at an early age to train in Germany and who had to overcome both physical and mental obstacles when he first entered the pro scene.
There were even charges that he was a choker and a bit of a hypochondriac as he struggled to deal with the physicality of Nadal and the legend of Federer.
But all that changed with his maiden major win in the 2008 Australia Open and then his wonder run in 2011 when he won the Australian and US Opens as well as Wimbledon.
He now has 10 Grand slam titles, four shy of Nadal’s haul and seven away from the all-time record of Federer.
But at 28 and in the peak of his career, overtaking them both is a very realistic target.
“I have been through stages in my life where I struggled a lot physically, especially in the beginning of the professional career. But, all those experiences in the past have helped me to get stronger, to learn from those experiences, to understand myself, my body,” he said.
“I try to take nothing for granted. I try to work on it all the time, because I know that that is the only way I’m managing to stay successful, is to continue progressing.
“I’m not trying to keep the status quo, because for me then that’s a regression.
“I just try to progress, improve all the time, work on certain things in my life and my game, and hopefully get better in the process, which I feel I’m doing now.”
Progressing for Djokovic now means winning the ATP World Tour Finals in London for the fourth time in two weeks’ time.
“I look forward to it, especially because of the fact that I have had the season that I have had, and the way that I’m feeling confidently. Hopefully I can finish off the season with another great win,” he said.
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