(CNN) -- Roger Federer maintained his indoor supremacy over top-ranked Rafael Nadal as he won the season-ending ATP World Tour Finals event for the fifth time in his career on Sunday.
Nadal held a 14-7 career record over his longtime rival before the final, but the Spaniard slumped to his third successive indoor defeat to the Swiss player despite battling back strongly in the second set in London.
Federer claimed his 66th career title and the $1.63 million first prize with a 6-3 3-6 6-1 success in the tournament's first final played between the world's top-two players in 24 years.
Both players went into the match on the back of four successive victories, with Federer not having lost a set.
The 29-year-old, who lost his No. 1 ranking again to Nadal this year, won the first set in just 32 minutes after breaking his opponent in the eighth game and then serving out to love. CNN
