David Rudisha became the first athlete since New Zealand’s Peter Snell in 1964 to retain the men’s 800m Olympic title.
The 27-year-old Kenyan hit the front with about 300m to go after compatriot Alfred Kipketer sprinted clear on the first lap of the race.
Rudisha finished in one minute 42.15 seconds, ahead of Algeria’s Taoufik Makhloufi and fast-finishing American Clayton Murphy.
“I am so excited,” said Rudisha. “It is the greatest moment of my career.”
Makhloufi ran a new national record of one minute 42.61 seconds and Murphy clocked a personal best of one minute 42.93 seconds in a bizarre race.
Kipketer set out fast, going through the first 200m in just 23 seconds.
But the 19-year-old, who had beaten Rudisha in the Kenyan national trials, faded to finish seventh in Rio.
“Running 1:42, it’s just fantastic,” added Rudisha. “I had no doubts before. The feeling in my body was good. It is great to win such a big competition.”
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