The match finished with the Centre Court roof shut after a brief rain delay early in the second set.
The third-seeded Murray has won all 12 sets he’s played in the tournament this year, dropping 32 games. His All England Club winning streak is 17 matches, including the run to a gold medal at the 2012 London Olympics.
In 2013, Murray became the first British man in 77 years to win Wimbledon.
Anderson was trying to reach his first Grand Slam quarterfinal. He would have been the first man from South Africa to get to Wimbledon’s quarterfinals since Wayne Ferreira in 1994.
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