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Djokovic, Nadal set for championshipDefending champion Novak Djokovic set up an enticing final against Rafael Nadal with a 6-3, 6-3 victory over Stanislas Wawrinka Sunday at the ATP World Tour Finals in London. Nadal ended Roger Federer’s hopes of finishing a disappointing season on a high note, defeating the six-time champion, 7-5, 6-3, in the other semifinal. Unbeaten in his round-robin matches this week, the second-seeded Djokovic extended his winning streak to 21 matches since losing in the US Open final to Nadal. The two will play for the title Monday. In doubles, three-time champions Bob and Mike Bryan advanced to the final after defeating Alexander Peya and Bruno Soares, 4-6, 6-4, 10-8.