01:16 PM GMT November 02, 2013
The singles draw ceremony for the 2013 Barclays ATP World Tour Finals took place on Saturday at The O2 in London.
Juan Martin del Potro
World No. 1 Rafael Nadal, the 2010 runner-up (l. to Federer), qualified for the ninth straight year, but competes at The O2 for the first time since 2011.
Defending champion Novak Djokovic, who beat Roger Federer in the 2012 final, also won the title in 2008 (d. Davydenko) when the event was held in Shanghai.
Federer has won the Barclays ATP World Tour Finals on a record six occasions in 2003 (d. Agassi), 2004 (d. Hewitt), 2006 (d. Blake), 2007 (d. Ferrer), 2010 (d. Nadal) and 2011 (d. Tsonga). He is appearing at the season finale for a record-tying 12th successive year.
David Ferrer, the 2007 finalist, Juan Martin del Potro, the 2009 runner-up, Tomas Berdych will also be in action alongside first-time qualifier Stanislas Wawrinka and Richard Gasquet, who is among the elite eight for the first time since 2007.