ATP Finals review: Is Novak Djokovic the greatest 35-year-old in the history of sport?
Calvin Betton dials in from Italy to join George Bellshaw and James Gray of the i newspaper and inews.co.uk to talk all things tennis, including:
Will Novak Djokovic ever age?
Is he already the greatest 35-year-old in the history of sport?
Will he surpass Roger Federer's record of six ATP Finals titles?
Do we read much into Rafael Nadal's defeats to Felix Auger-Aliassime and Taylor Fritz?
Could he still win the Australian Open next year?
Is Casper Ruud sneakily the most consistent player on tour? Or is he just 'a Poundland Djokovic'?
Can we possibly agree with Stefanos Tsitsipas on Andrey…
The skinny
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