World number one Novak Djokovic reached the semi-finals of the ATP Finals World Tour in London after a comfortable straight-set win over Alexander Zverev. The ruthless Serb took less than 80 minutes to wrap up the game 6-4, 6-1 at O2 Arena.
Number 3 seed Zverev started well and put the two break points for the 14 times Grand Slam champ in the first set. However, the young German failed to make an effective challenge as the veteran went on to win seven of the next eight games.
Djokovic was more aggressive in the second set as he continued to dominate on his serve. Zverev couldn’t make more pressure, making more errors and threw the game away.
While Zverev takes on American John Isner on Friday, while Djokovic plays Marin Cilic of Croatia in his final round-robin match. Zverev can still reach the semifinals for the first time if he beats Isner.
Djokovic, who has won 50 'Big Titles' from 169 opportunities, is favorite to win the final big title of the end season. The top two players from the two groups qualify for the semi-finals on Saturday, with the winner of those matches competing in Sunday’s final.