|2019 Nitto ATP Finals|
|Venue: O2 Arena, London Dates: 10-17 November|
|Coverage: Watch live coverage of one match per day on BBC TV, BBC iPlayer and online; Listen on BBC Radio 5 Live Sports Extra; Live text on selected matches on the BBC Sport website and app. Click here for Live Guide.|
A nerveless Stefanos Tsitsipas came from a set down to beat Dominic Thiem on a thrilling final-set tie-break and become the youngest winner of the ATP Finals in 18 years.
The Greek, 21, won 6-7 (6-8) 6-2 7-6 (7-4) to claim the biggest title of his fledgling career.
Thiem, 26, who edged a tight first set, fell away in the second and the start of the third before fighting back.
But Tsitsipas forced a tie-break, and then won it, at a raucous O2 Arena.
He collapsed to the floor after Thiem put a forehand return out on the first match point before the pair embraced at the end of a two-hour 35-minute battle.
He is the youngest winner of the season-ending championships since Australia’s Lleyton Hewitt in 2001 and claims prize money of just over £2m.
“It’s been a roller-coaster. Holding this trophy is amazing,” Tsitsipas said.
More to follow.