Novak Djokovic celebrated his return to the top of the world rankings with a 7-6 (7/4), 6-3 victory over Jo-Wilfried Tsonga in the ATP Tour Finals at London's O2 Arena on Monday.
Serbia's Novak Djokovic returns against France's Jo-Wilfried Tsonga during their group A singles match in the round robin stage on the first day of the ATP World Tour Finals tennis tournament in London. Djokovic celebrated his return to the top of the world rankings with a 7-6 (7/4), 6-3 victory.
Although Djokovic has only one Grand Slam title to his name this year, at the Australian Open back in January, it has still been another fine year for the Serb, who replaced Roger Federer as world number one on Monday after a brief spell playing second fiddle to the Swiss star.
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