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Spain's Rafael Nadal of Indian Aces (C) shares a light moment with his team players after winning the match aganist Switzerlands Roger Federer of UAE Royals during the International Premier Tennis League (IPTL) tennis In New Delhi on December 12, 2015. / AFP / SAJJAD HUSSAIN (Photo credit should read SAJJAD HUSSAIN/AFP/Getty Images)

Spain's Rafael Nadal of Indian Aces (C) shares a light moment with his team players after winning the match aganist Switzerlands Roger Federer of UAE Royals   during the International Premier Tennis League (IPTL)  tennis In New Delhi on December 12, 2015.  / AFP / SAJJAD HUSSAIN        (Photo credit should read SAJJAD HUSSAIN/AFP/Getty Images)