Novak Djokovic has little trouble beating Tomas Berdych in his first game this year, the ATP World Tour Finals, winning 6-3, 6-3 on Monday, the match of the group.

Third-seeded Serb served well the whole had only taken two in two games and never had a break point.

It carried out the sixth ranked opponent around the court to the Czech O2 Arena, using a series of straight and back-hands Berdych sends sprinting from side to side.

"There is no easy game, it's easy opponent, what," Djokovic said the late-season tournament, which brings together the top eight players in the world.

Argentine football legend Diego Maradona and friend of Veronica Odeja look the other Serb Novak Djokovic and Czech Tomas Berdych during the match of round robin tennis singles in the ATP World Tour Finals at the O2 Arena in London, Monday, November 22, 2010. Djokovic strong performance aside, the biggest problem is Berdych beat him to serve.