Noach Djokovic set up in a second fight without giving a set to the London Masters on Wednesday, winning 6-4, 6-1 against German Alexander Zverev, 5th in the world.
Djokovic was anchored for about 50 minutes throughout the first match, saving two break points in four games around before he started quickly after the first win to finish the game in an hour and a quarter.
World number 1 had not lost his entry to Monday's stadium at this traditional meeting at the end of the year, bringing the eight best tennis players of the season to the O2 Arena in London. The Serbs defeated the American John Isner (ATP 10) 6-4, 6-3.
Winner of the Masters five times (2008 and 2012 to 2015), Djokovic, 31, wants to tie Roger Federer's record (6). This would have been an excellent return to the forefront for six months: Wimbledon and the US Open, and the 1000 Masters in Cincinnati and Shanghai. Djokovic is sure to end this year as a world number 1.
In the other match of the Guga Kuerten group, John Isner will face the Croatian Marin Cilic (ATP 7), which Zverev managed to defeat on the first day. If the American gets a set, Novak Djokovic will be eligible for the semi-finals.
In League Lleyton Hewitt, South Africa Kevin Anderson (ATP 6), who has two wins on the clock, is already confident of his place in the semifinals.