The ATP announced Wednesday that those three singles players and doubles teams Daniel Nestor and Nenad Zimonjic, and Bob and Mike Bryan clinched berths at the Nov. 9-16 tournament at Shanghai's Qi Zhong Stadium.
Nadal is second to Federer in the entry rankings, which determine seedings at tournaments and are based on the past 12 months of results. But the Spaniard, who beat Federer in an epic, five-set Wimbledon final Sunday, leads the 2008 race, which is based only on results this season. Nadal is 56-7 with a tour-leading six titles, including two at Grand Slam tournaments.
Federer is headed to his seventh consecutive Masters Cup, which he won in 2003, 2004, 2006 and 2007.
For Djokovic, who won the Australian Open in January, it's his second berth in the event.
Only eight singles players and eight doubles teams are invited to the tournament.
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