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Novak Djokovic and Roger Federer, who face off for the first time this year in Paris on Saturday, cross swords again next week at the World Tour Finals.
The pair, semi-finalists at the Paris Masters, are drawn in Group B at the season-closing tournament in London with Juan Martin del Potro and Richard Gasquet.
World number one Rafael Nadal tops Group A where he will come up against David Ferrer, Tomas Berdych and Stanislas Wawrinka.
All eight players made it to the last eight at Bercy this week.
Djokovic is gunning for his third title in the event after wins in 2008 and 2012. Federer, a six time Finals winner, is making his 12th straight appearance in the Tour Finals.
World Tour Finals
Rafael Nadal (ESP), David Ferrer (ESP), Tomas Berdych (CZE), Stanislas Wawrinka (SUI)
Novak Djokovic (SRB), Juan Martin del Potro (ARG), Roger Federer (SUI), Richard Gasquet (FRA)