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.


Messi suffers muscle strain, Miami reschedule preseason finale
Man City and Villa close gap on Arsenal, Liverpool edge Sunderland
Djokovic withdraws from Doha with fatigue
Rutherford and Motie shine as West Indies sink England
Australia begin T20 World Cup with win over Ireland
