Big Three back where they belong in year-end rankings

The Big Three is the year-end top three, something that last happened in 2014.

With Novak Djokovic at No 1, Rafael Nadal at No 2 and Roger Federer at No 3 on Monday, that trio of tennis greats leads the season's final ATP rankings for the seventh time.

This is the first occasion, though, that each of them has spent some time at the summit during the same year. The seven changes at No 1 were the most since 1999, when there were eight.