Tennis' hottest young stars on show at ATP Finals

STARTING this Sunday in London, the world's top eight singles tennis players and doubles teams will duke it out one more time before they wrap up their 2019 season. The Nitto ATP Finals marks the end of the men's tennis tour season, with a total of US$9 million in prize money up for grabs.

Three of the game's most talented youngsters- Daniil Medvedev, Stefanos Tsitsipas and Matteo Berrettini - are making their debut at the week-long ATP Finals, and they will square off against the dominant trio of Roger Federer, Rafael Nadal and Novak Djokovic in the round-robin stage. Here's a snapshot of the eight players and their chances of walking away from London's O2 Arena with the gleaming trophy.

Rafael Nadal (Spain)