Novak Djokovic and Andy Murray won their opening matches Monday at the ATP finals, setting up a Wednesday showdown between two of the top three players in the world.

The top—ranked Djokovic beat Jo—Wilfried Tsonga 7—6 (4), 6—3 in Group A, hours after third—ranked Murray rallied to defeat Tomas Berdych 3—6, 6—3, 6—4.

The ATP finals is the season—ending tournament for the top eight players in the world. Fourth—ranked Rafael Nadal, however, pulled out because of injury.

Group B, which includes six—time champion Roger Federer, will play Tuesday at the O2 Arena.

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