LONDON: Roger Federer clinched a scintillating win over his rival Novak Djokovic to secure berth in the ATP Finals last four at the O2 Arena.
Swiss third seed Federer, 38, won 6-4 6-3 in a round-robin match which eliminates the Serb second seed from the season-ending tournament in London.
With this win, Federer will now meet top seed Rafael Nadal or Stefanos Tsitsipas in the last four.
Djokovic’s defeat also means Spain’s Nadal is guaranteed to finish as the year-end world number one.
Nadal, 33, is far from certain of reaching the last four himself, needing victory over Greek sixth seed Tsitsipas on Friday to have any chance.