London - Spain's World No 2 Rafael Nadal will meet great rival Roger Federer of Switzerland in the group stages of the ATP World Tour Finals, following Tuesday's draw in London.
Federer comes into the the week-long event on the back of tournament victories in Basel and Paris.
Their Group B also features Paris finalist Jo-Wilfried Tsonga and American Mardy Fish.
In Group A, Britain's Andy Murray will face world No 1 Novak Djokovic.
Murray was also drawn in the same group as Spaniard David Ferrer and Czech Tomas Berdych, who knocked him out at the quarter-final stage of the Paris Masters last week.
Djokovic has won three of this season's four Grand Slam tournaments, including the Australian Open where he beat Murray in the final.
The Serb, who went on to win Wimbledon in the summer, has been struggling with back and shoulder injuries since his victory at the US Open in September.
Djokovic was forced to withdraw from the Paris Masters last week before the quarter-finals stage, although he is hopeful of being fully fit to compete in London.
The tournament begins on Sunday and ends November 27.
Draw for the ATP Finals to be held in London:
Group A: Novak Djokovic (SRB), Andy Murray (GBR), David Ferrer (ESP), Tomas Berdych (CZE)
Group B: Rafael Nadal (ESP), Roger Federer (SUI), Jo-Wilfried Tsonga (FRA), Mardy Fish (USA)