Novak Djokovic will be looking to celebrate his return to the world number one ranking with victory at the ATP Finals in London.
The Serb, 31, has won the season-ending event five times and another victory would cap a successful season that has included the Wimbledon and US Open titles.
His other opponents in the Guga Kuerten group for the round-robin stage are Marin Cilic, Alexander Zverev and John Isner.
He starts his campaign against Isner on Monday (not before 20:00 GMT).
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