Big 3 of Djokovic, Nadal, Federer closes 2018 ranked 1-2-3

FILE - In this Wednesday, Nov. 14, 2018, file photo, Novak Djokovic, of Serbia celebrates, after defeating Alexander Zverev, of Germany, in the ATP World Tour Finals men's singles tennis match at the O2 arena in London. Novak Djokovic, Rafael Nadal and Roger Federer are the top three in the year-end ATP rankings for the first time since 2014. It is the seventh time that trio of tennis greats is 1-2-3 to close a season. (AP Photo/Alastair Grant, File)