Nadal beats Wawrinka, clinches year-end No. 1 rank at ATP Finals

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Nadal beats Wawrinka, clinches year-end No. 1 rank at ATP Finals

Rafael Nadal has maintained a high level of momentum this year which propelled him to the No. 1 spot. — Rafael Nadal has maintained a high level of momentum this year which propelled him to the No. 1 spot :: Clive Brunskill/Getty Images

Copyright 2014 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.

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Published Nov 6, 2013 | Modified Nov 6, 2013

SI Staff