At The Economist’s Game Theory blog, I wrote about Novak Djokovic’s return to the top:
But Mr Djokovic is playing better in his 32nd year than Mr Federer did, and his more rounded game means that he can compete on all surfaces—even with Mr Nadal on clay—in a way that Mr Federer could not. The odds are against the Serb reaching 20 majors, but another two or three seasons at the top could easily give him a final total of 17 or 18—enough to move Mr Djokovic out of his default position in third place. Fans of Roger and Rafa have long dominated the debate about who is the greatest male player of all time. But by the end of the decade, Mr Djokovic’s trophy cabinet could well be as bulging as those of his legendary rivals.