Tomas Berdych reawakened his potentials at the ATP World Tour Finals with a straight-sets win over David Ferrer.
A 6-4, 6-4 victory in Group A brought the Czech back into contention for the semi-finals, after he lost his opening match to Stanislas Wawrinka.
Berdych, 28, will play world number one Rafael Nadal, who is already through to the last four, in his final round-robin match on Friday.
Wawrinka can still take the second qualifying spot but Ferrer is out.
Berdych has lost his last 15 matches against Nadal, and his last win came back in 2006.
“Matches against him are always like a final because you’re playing the number one player in the world,” said Berdych.
“Every time you go on court with him it’s amazing. It’s already many, many matches that he’s won [against me] and I need to do something about that.”