Federer overcame a slow start in the first set to win 7-6 (7-5), 6-2 in front of a sellout crowd at London’s O2 arena at the season-ending championships for the world’s top tennis players.
Earlier in the day, Djokovic fought back from a set and a break down to beat Juan Martin del Potro to move to the title match tomorrow.
The 25-year-old from Serbia defeated the 24-year-old Argentine 4-6, 6-3, 6-2. Djokovic has been undefeated all week in London at the ATP Finals, which start with a round-robin format which .
The second-ranked Federer had defeated the third-ranked Scot at Wimbledon in July, a result that reduced his opponent to tears afterwards. A month later, Murray got the better of Federer in the Olympic gold-medal match, and also beat him in Shanghai last month.
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