Nadal and Tsitsipas register contrasting wins at ATP Finals

Rafal Nadal has kept his hopes alive of progressing to the last-four of the season-ending ATP Tour Finals in London.

He fought back from 5-1 down in the final set to defeat Daniil Medvedev 6-7, 6-3, 7-6

The Spanish world number one must now beat Stefanos Tsitsipas on Friday to have a chance of advancing.

Tsitsipas, who is making his debut at the tournament, has already reached the semifinal after beating defending champion Alexander Zverev 6-3, 6-2.