Serbian Novak Djokovic, the world's top tennis racket, maintained his impeccable pace at the Masters Cup with a 6-2, 6-1 win over Britain's Cameron Norrie in the Green group.

Havana, November 20 (RHC)-- Serbian Novak Djokovic, the world's top tennis racket, maintained his impeccable pace at the Masters Cup with a 6-2, 6-1 win over Britain's Cameron Norrie in the Green group.

Djokovic, who is seeking to equal Swiss Roger Federer's record of six titles in the history of the tournament, needed just 66 minutes to beat Norrie, who entered the main draw as a replacement for Greek Stefanos Tsitsipas.

The Balkan, winner of three of the four Grand Slams of the current season, added his 41st victory in the ATP Finals and continues without losing a set in the Turin event.

Djokovic won five points with his serve to one of the defeated and had 76 percent of effectiveness with his first serve against Norrie's 63. He also won five breaks in 10 opportunities against an opponent who did not complete any of them in one occasion.

The Serb won 76 percent of the points with the first serve against Norrie's 56 and reached 78 percent supported by the second serve, far from the 35 achieved by the British.

Djokovic can now focus on tomorrow's semifinal against German Alexander Zverev. The world number one won seven of the 10 matches against the German, but Zverev denied him last August the title of the Olympic Games in Tokyo.

The other semifinal will be contested by Russian Daniil Medvedev and Norwegian Casper Ruud, in his debut at the ATP Finals.

Ruud beat Russian Andrey Rublev in three sets by 2-6, 7-5, 7-6 (7/5), and advanced to the round of the best four.