Rafael Nadal defeated Andy Murray, 6-4, 6-1, for his second straight victory at the ATP World Tour Finals in London and a spot in the semifinals. In a later match, Stan Wawrinka overcame an early break in the first set to beat David Ferrer, 7-5, 6-2. The loss eliminated Ferrer from the round-robin tournament. Murray will play Wawrinka on Friday for a spot in the semifinals.