World number five Alexander Zverev has qualified for the ATP Finals in London for the second year in a row.
The 21-year-old German will be hoping to add to the three titles he has won in 2018.
His opponents in the the Guga Kuerten group for the round-robin stage are world number one Novak Djokovic, Marin Cilic and John Isner .
He starts his campaign against Cilic on Monday (not before 14:00 GMT).
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