(CNN) -- World No. 1 Rafael Nadal set up a semifinal showdown with Andy Murray after winning his third successive match at the season-ending ATP World Tour Finals in London on Friday. The Spaniard overcame sixth seed Tomas Berdych 7-6 (7-3) 6-1 to repeat his victory over the Czech in the Wimbledon final in July. Third seed Novak Djokovic will play No. 2 Roger Federer in Saturday evening's second semifinal after handing American Andy Roddick his third successive defeat in Friday's closing match of the round-robin stage. The 24-year-old, who needed to win just one set to progress, completed his seventh straight win over Berdych despite losing his cool with an umpiring call.
@highlight
Rafael Nadal defeats Tomas Berdych to reach semifinals and eliminate the Czech
@highlight
World No. 1 will on Saturday play Andy Murray, who was runner-up in Group B
@highlight
World No. 3 Novak Djokovic beats Andy Roddick in Friday night's final Group A tie
@highlight
Serbian won in straight sets to earn last-four clash with Roger Federer on Saturday evening
It's going to be a really, really difficult match against Andy," he told the crowd after ending @placeholder's hopes of progressing.