Dethroned French Open champion Rafael Nadal says he was too busy training to watch Stan Wawrinka's gripping final defeat of Novak Djokovic at Roland Garros on Sunday.
The nine-time French Open winner's 2015 tournament ended prematurely last week when he suffered a quarter-final rout by Djokovic.
That was only the Spaniard's second loss in 72...
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