London, England (Sports Network) - In the marquee match of the week thus far, world No. 1 Novak Djokovic outlasted third-ranked Andy Murray in round- robin action Wednesday at the $7.125 million ATP World Tour Finals.
The Australian Open champion Djokovic came from behind to beat the U.S. Open and Olympic titlist Murray 4-6, 6-3, 7-5 in a match of the highest quality at The O2 Arena. Murray upset Djokovic in the September's U.S. Open final.
Djokovic prevailed in 2 hours, 34 minutes, as he tallied one more service break than Murray, who smacked nine aces in a losing effort on Day 3.
Djokovic, who will finish as the year-end No. 1 for a second straight year, captured this elite eight-player event in Shanghai in 2008.
Later Wednesday, fifth seed Tomas Berdych will tangle with seventh-seeded Jo-Wilfried Tsonga, who was last year's Tour Finals runner-up to Roger Federer.
This week's four-player Group A features Djokovic (2-0), Murray (1-1), Berdych (0-1) and Tsonga (0-1), while Group B boasts Federer (1-0), David Ferrer (1-0), Juan Martin del Potro (0-1) and Janko Tipsarevic (0-1). The top-two players from each group will play in the semifinals on Sunday, and the winners will square off in the lucrative finale Monday in London.
The 2012 World Tour Finals champion can earn as much as $1.76 million.