LONDON: Collated results from the seventh day of the ATP World Tour Finals at London's O2 Arena on Saturday (x denotes seeding):

Singles

Semi-finals

Novak Djokovic (SRB x1) bt Rafael Nadal (ESP x5) 6-3, 6-3

Roger Federer (SUI x3) bt Stan Wawrinka (SUI x4) 7-5, 6-3

Doubles

Semi-finals

Rohan Bopanna/Florin Mergea (IND/ROM x8) bt Ivan Dodig/Marcelo Melo (CRO/BRA x3) 6-4, 6-2

Jean-Julien Rojer/Horia Tecau (NED/ROM x2) bt Bob Bryan/Mike Bryan (USA/USA x1) 6-4, 6-4

Copyright AFP (Agence France-Presse), 2015