Nadal beats Wawrinka, clinches year-end No. 1 rank at ATP FinalsCopyright 2014 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.SI Staff|Share on FacebookShare on XAdd us as a preferred sourceNadal beats Wawrinka, clinches year-end No. 1 rank at ATP FinalsCopyright 2014 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.Add us as a preferred source on GoogleFollowLoading recommendations... Please wait while we load personalized content recommendationsPublished Nov 6, 2013 | Modified Nov 6, 2013SI STAFFShare on FacebookShare on XHome/Tennis